阅读说明：本技术 一种高拉伸负荷的塑料编织袋用扁丝 (High-tensile-load flat filament for plastic woven bag ) 是由 张爱军 张峰 陈颜君 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种高拉伸负荷的塑料编织袋用扁丝,其技术方案要点包括如下重量份的组份：聚乙烯80-100份、填充母料10-15份、丙烯酸树脂8-12份、聚乳酸4-8份、β-晶型成核剂0.1-0.4份、铝粉0.06-0.1份、光稳定剂0.1-0.3份；所述高拉伸负荷的塑料编织袋用扁丝的制备方法包括取料、研磨干燥、挤出成膜、冷却成型、扁丝成型、以及加热定型。本发明具有将聚乙烯作为扁丝的主要原料,将填充母料作为填充材料,增加丙烯酸树脂在熔融状态时与均匀分布在成品扁丝的各个部位的聚乳酸协同作用,形成网状(网格)结构；与此同时,β-晶型成核剂具有显著提升成品扁丝的抗冲击性以及耐热变形性的效果；因此,获得的成品扁丝具有拉伸负荷以及断裂强度高,且在自然环境内自然降解的效果。(The invention discloses a high-tensile-load flat filament for a plastic woven bag, which adopts the technical scheme that the flat filament comprises the following components in parts by weight: 80-100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.4 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder and 0.1-0.3 part of light stabilizer; the preparation method of the flat filament for the plastic woven bag with the high tensile load comprises the steps of taking materials, grinding and drying, extruding to form a film, cooling and forming, forming the flat filament, and heating and shaping. The invention takes polyethylene as the main raw material of the flat filament, takes the filling master batch as the filling material, increases the synergistic effect of the acrylic resin and the polylactic acid which is uniformly distributed on each part of the finished flat filament when the acrylic resin is in a molten state, and forms a reticular (grid) structure; meanwhile, the beta-crystal form nucleating agent has the effect of remarkably improving the impact resistance and the heat deformation resistance of the finished flat filament; therefore, the obtained finished flat filament has the effects of high tensile load and breaking strength and natural degradation in natural environment.)

1. The flat filament for the plastic woven bag with high tensile load is characterized by comprising the following components in parts by weight: 80-100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.4 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder and 0.1-0.3 part of light stabilizer;

the preparation method of the flat filament for the plastic woven bag with the high tensile load comprises the following steps:

step 1, taking materials: weighing 80-100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.4 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder and 0.1-0.3 part of light stabilizer in parts by weight, and mixing to form a mixed material;

step 2, grinding and drying: adding the weighed mixed material into a ball mill for mixing and grinding, adding the obtained mixed material with the particle size of 100-180 meshes into a drying stirrer, and stirring and drying to obtain a dry mixture;

step 3, extruding and film forming: adding the dried mixture into an extruder, carrying out melt mixing at 170-180 ℃, and forming and extruding into a film through an extruder die head;

and 4, cooling and forming: cooling and shaping the extruded film by cooling water at 30-45 ℃;

step 5, flat wire forming: cutting the shaped film into plastic embryonic filaments by a cutting machine;

step 6, heating and shaping: heating the plastic blank filament to 60-80 ℃ and stretching, controlling the draft ratio to be 2.5 and heat setting, cooling at 40-50 ℃ after the stretching is finished, controlling the retraction ratio to be 0.98-0.99 and obtaining the finished flat filament.

2. The flat filament for plastic woven bags with high tensile load according to claim 1, wherein: also comprises 0.04 to 0.08 weight part of rosin modified phenolic resin.

3. The flat filament for plastic woven bags with high tensile load according to claim 2, wherein: also comprises 0.01 to 0.04 weight portion of magnesium carbonate powder.

4. The flat filament for plastic woven bags with high tensile load according to claim 3, wherein: the light stabilizer is a hindered amine light stabilizer.

5. The flat filament for plastic woven bags with high tensile load according to claim 4, wherein the preparation method of the flat filament for plastic woven bags with high tensile load comprises the following steps:

step 1, taking materials: weighing 80-100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.4 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder, 0.04-0.08 part of rosin modified phenolic resin, 0.01-0.04 part of magnesium carbonate powder and 0.1-0.3 part of hindered amine light stabilizer according to parts by weight, and mixing to form a mixed material;

step 2, grinding and drying: adding the weighed mixed material into a ball mill for mixing and grinding, adding the obtained mixed material with the particle size of 100-180 meshes into a drying stirrer, and stirring and drying to obtain a dry mixture;

step 3, extruding and film forming: adding the dried mixture into an extruder, carrying out melt mixing at 170-180 ℃, and forming and extruding into a film through an extruder die head;

and 4, cooling and forming: cooling and shaping the extruded film by cooling water at 30-45 ℃;

step 5, flat wire forming: cutting the shaped film into plastic embryonic filaments by a cutting machine;

step 6, heating and shaping: heating the plastic blank filament to 60-80 ℃ and stretching, controlling the draft ratio to be 2.5 and heat setting, cooling at 40-50 ℃ after the stretching is finished, controlling the retraction ratio to be 0.98-0.99 and obtaining the finished flat filament.

6. The flat filament for plastic woven bags with high tensile load according to claim 5, wherein the preparation method of the flat filament for plastic woven bags with high tensile load comprises the following steps:

step 1, taking materials: weighing 100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.3 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder, 0.05-0.07 part of rosin modified phenolic resin, 0.02-0.04 part of magnesium carbonate powder and 0.1-0.3 part of hindered amine light stabilizer according to parts by weight, and mixing to form a mixed material;

step 2, grinding and drying: adding the weighed mixed material into a ball mill for mixing and grinding, adding the obtained mixed material with the particle size of 100-180 meshes into a drying stirrer, and stirring and drying to obtain a dry mixture;

step 3, extruding and film forming: adding the dried mixture into an extruder, carrying out melt mixing at 170-180 ℃, and forming and extruding into a film through an extruder die head;

and 4, cooling and forming: cooling and shaping the extruded film by cooling water at 30-45 ℃;

step 5, flat wire forming: cutting the shaped film into plastic embryonic filaments by a cutting machine;

step 6, heating and shaping: heating the plastic blank filament to 80 ℃ and stretching, controlling the draft ratio to be 2.5 and heat setting, cooling at 40-50 ℃ after the stretching is finished, controlling the retraction ratio to be 0.98-0.99 and obtaining the finished flat filament.

Technical Field

The invention relates to the technical field of flat filaments for plastic woven bags, in particular to a high-tensile-load flat filament for plastic woven bags.

Background

The plastic woven bags are divided into polypropylene bags and polyethylene bags according to the composition of main raw materials; meanwhile, the plastic woven bags are divided into bottom sewing bags and edge sewing bags according to the main sewing method. The plastic woven bag has the characteristics of high tensile strength, corrosion resistance and low manufacturing cost, and is widely applied to packing objects such as fertilizers, chemical products and the like.

Chinese patent publication No. CN108164730A discloses a production process of a plastic woven bag, which comprises the following steps: (1)performing material drawing; (2)performing mixed ball milling on the dry section; (3)provide for extruding flat films; (4), cooling; (5) cutting; (6) heating, stretching and shaping; (7) spinning the flat filament after heating, stretching and shaping to obtain plastic cloth; (8), compounding at least two layers of plastic cloth, taking out the material, and cooling to obtain composite plastic cloth; (9) eliminating static electricity; and (4) feeding the (+) -composite plastic cloth into a bag making machine to obtain the plastic woven bag.

However, the plastic woven bag has poor tensile load and breaking strength, and is difficult to form effective degradation in natural environment, so that the plastic woven bag causes persistent pollution to the environment and needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the high-tensile-load flat filament for the plastic woven bag, which has the effects of obviously improving the tensile load and the breaking strength and naturally degrading in a natural environment.

In order to achieve the purpose, the invention provides the following technical scheme:

a high tensile load flat filament for plastic woven bags comprises the following components in parts by weight: 80-100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.4 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder and 0.1-0.3 part of light stabilizer;

the preparation method of the flat filament for the plastic woven bag with the high tensile load comprises the following steps:

step 1, taking materials: weighing 80-100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.4 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder and 0.1-0.3 part of light stabilizer in parts by weight, and mixing to form a mixed material;

step 2, grinding and drying: adding the weighed mixed material into a ball mill for mixing and grinding, adding the obtained mixed material with the particle size of 100-180 meshes into a drying stirrer, and stirring and drying to obtain a dry mixture;

step 3, extruding and film forming: adding the dried mixture into an extruder, carrying out melt mixing at 170-180 ℃, and forming and extruding into a film through an extruder die head;

and 4, cooling and forming: cooling and shaping the extruded film by cooling water at 30-45 ℃;

step 5, flat wire forming: cutting the shaped film into plastic embryonic filaments by a cutting machine;

step 6, heating and shaping: heating the plastic blank filament to 60-80 ℃ and stretching, controlling the draft ratio to be 2.5 and heat setting, cooling at 40-50 ℃ after the stretching is finished, controlling the retraction ratio to be 0.98-0.99 and obtaining the finished flat filament.

By adopting the technical scheme, the polyethylene is used as the main raw material of the flat filament, the filling master batch is used as the filling material, and the synergistic effect of the acrylic resin and the polylactic acid uniformly distributed at each part of the finished flat filament is increased in a molten state to form a net (grid) structure; meanwhile, the beta-crystal form nucleating agent has the effect of remarkably improving the impact resistance and the heat deformation resistance of the finished flat filament; the aluminum powder is used as a lubricant, has strong covering power and good light and heat reflection performance, and plays a role in effectively improving the light aging resistance of the finished flat filament after being cooperated with a light stabilizer; therefore, the obtained finished flat filament has the effects of high tensile load and breaking strength and natural degradation in natural environment.

The invention is further configured to: also comprises 0.04 to 0.08 weight part of rosin modified phenolic resin.

By adopting the technical scheme, the rosin modified phenolic resin is attached to the surfaces of the component particles during melting and mixing, so that the year and the elasticity of the melting and mixing materials are improved, the shaping rate of the extruded film is effectively improved, and the phenomenon that the processing and production quality of the flat filament is influenced by the deformation of the extruded film during shaping is avoided.

The invention is further configured to: also comprises 0.01 to 0.04 weight portion of magnesium carbonate powder.

By adopting the technical scheme, the magnesium carbonate powder plays a role in improving the strength of the flat wire, and the high-temperature resistance of the finished flat wire is effectively improved.

The invention is further configured to: the light stabilizer is a hindered amine light stabilizer.

By adopting the technical scheme, the hindered amine light stabilizer is used as a free radical trapping agent and has the comprehensive capacity of trapping free radicals, fragmenting singlet oxygen chromophore and decomposing peroxide.

The invention is further configured to: the preparation method of the flat filament for the plastic woven bag with the high tensile load comprises the following steps:

step 1, taking materials: weighing 80-100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.4 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder, 0.04-0.08 part of rosin modified phenolic resin, 0.01-0.04 part of magnesium carbonate powder and 0.1-0.3 part of hindered amine light stabilizer according to parts by weight, and mixing to form a mixed material;

step 2, grinding and drying: adding the weighed mixed material into a ball mill for mixing and grinding, adding the obtained mixed material with the particle size of 100-180 meshes into a drying stirrer, and stirring and drying to obtain a dry mixture;

step 3, extruding and film forming: adding the dried mixture into an extruder, carrying out melt mixing at 170-180 ℃, and forming and extruding into a film through an extruder die head;

and 4, cooling and forming: cooling and shaping the extruded film by cooling water at 30-45 ℃;

step 5, flat wire forming: cutting the shaped film into plastic embryonic filaments by a cutting machine;

step 6, heating and shaping: heating the plastic blank filament to 60-80 ℃ and stretching, controlling the draft ratio to be 2.5 and heat setting, cooling at 40-50 ℃ after the stretching is finished, controlling the retraction ratio to be 0.98-0.99 and obtaining the finished flat filament.

By adopting the technical scheme, the obtained finished flat filament has the effects of obviously improving the tensile load and the breaking strength and naturally degrading in a natural environment.

The invention is further configured to: the preparation method of the flat filament for the plastic woven bag with the high tensile load comprises the following steps:

step 1, taking materials: weighing 100 parts of polyethylene, 10-15 parts of filling master batch, 8-12 parts of acrylic resin, 4-8 parts of polylactic acid, 0.1-0.3 part of beta-crystal form nucleating agent, 0.06-0.1 part of aluminum powder, 0.05-0.07 part of rosin modified phenolic resin, 0.02-0.04 part of magnesium carbonate powder and 0.1-0.3 part of hindered amine light stabilizer according to parts by weight, and mixing to form a mixed material;

step 2, grinding and drying: adding the weighed mixed material into a ball mill for mixing and grinding, adding the obtained mixed material with the particle size of 100-180 meshes into a drying stirrer, and stirring and drying to obtain a dry mixture;

step 3, extruding and film forming: adding the dried mixture into an extruder, carrying out melt mixing at 170-180 ℃, and forming and extruding into a film through an extruder die head;

and 4, cooling and forming: cooling and shaping the extruded film by cooling water at 30-45 ℃;

step 5, flat wire forming: cutting the shaped film into plastic embryonic filaments by a cutting machine;

step 6, heating and shaping: heating the plastic blank filament to 80 ℃ and stretching, controlling the draft ratio to be 2.5 and heat setting, cooling at 40-50 ℃ after the stretching is finished, controlling the retraction ratio to be 0.98-0.99 and obtaining the finished flat filament.

By adopting the technical scheme, the tensile load and the breaking strength of the obtained finished flat filament are further improved, and the flat filament has a natural degradation effect in a natural environment.

In conclusion, the invention has the following beneficial effects:

1. the tensile load is high;

2. the breaking strength is high;

3. excellent light aging resistance;

4. has natural degradation effect in natural environment, and avoids environmental pollution.

Detailed Description