Anti-aging plastic woven bag and preparation method thereof

Abstract

The invention discloses an anti-aging plastic woven bag and a preparation method thereof, belongs to the technical field of plastic woven bags, and solves the problem that the strength and the anti-aging performance of woven bags in the prior art are not ideal enough. The anti-aging plastic woven bag is prepared from the following components in parts by mass: 35 to 50 parts of polypropylene particles, 15 to 35 parts of polyethylene, 5 to 15 parts of polypropylene film, 5 to 15 parts of calcium carbonate, 0.5 to 1.5 parts of anti-aging agent and 0.5 to 1.5 parts of silicon dioxide aerogel. The aging-resistant plastic woven bag provided by the invention has excellent tensile property, wear resistance and aging resistance.

Description

Technical Field

[0001] This invention relates to the field of plastic woven bag technology, and more specifically to an aging-resistant plastic woven bag and its preparation method. Background Technology

[0002] Plastic woven bags are typically made from chemical plastics such as polyethylene and polypropylene. The process involves extruding film, drawing into single filaments, cutting, and weaving into bags. Plastic woven bags offer advantages such as lightweight construction, ease of use, and waterproofing, and are widely used in packaging materials for chemical and agricultural industries. Polyethylene is a thermoplastic resin obtained by polymerizing ethylene. Industrially, it also includes copolymers of ethylene with small amounts of α-olefins. Polyethylene is odorless, non-toxic, and has a waxy feel. It possesses excellent low-temperature resistance (minimum operating temperature can reach -70 to -100℃), good chemical stability, and resistance to most acids and alkalis (except oxidizing acids). It is insoluble in common solvents at room temperature, has low water absorption, and excellent electrical insulation properties. Polypropylene is also widely used in woven bag production due to its lightweight, high strength, and good chemical stability. However, traditional polypropylene woven bags are susceptible to damage from UV radiation and oxidation during prolonged outdoor use, leading to a decline in physical properties and a shortened lifespan.

[0003] In existing technologies, the aging resistance of plastic woven bags is generally improved by adding additives such as ultraviolet absorbers, ultraviolet quenchers, and antioxidants. However, this method has the problems of complex production processes and high costs, and may also lead to a decrease in the mechanical strength of the plastic woven bags. Although there are various methods for preparing modified polypropylene materials in the existing technology, how to simplify the production process and reduce costs while ensuring material performance remains a problem that urgently needs to be solved. Summary of the Invention

[0004] This invention provides an aging-resistant plastic woven bag and its preparation method, which solves the problem that the strength and aging resistance of woven bags in the prior art are not ideal.

[0005] In a first aspect, the present invention provides an aging-resistant plastic woven bag, comprising, by weight, the following components: 35-50 parts of polypropylene granules, 15-35 parts of polyethylene, 5-15 parts of propylene film, 5-15 parts of calcium carbonate, 0.5-1.5 parts of anti-aging agent, and 0.5-1.5 parts of silica aerogel.

[0006] As one possible implementation, by weight, it comprises the following components: 35 parts polypropylene particles, 35 parts polyethylene, 15 parts recycled propylene film, 5 parts calcium carbonate, 1.5 parts anti-aging agent, and 1.5 parts silica aerogel.

[0007] Secondly, the present invention provides a method for preparing an aging-resistant plastic woven bag according to any possible implementation of the first aspect, comprising the following steps: mixing the component raw materials according to the formula ratio to obtain a mixture; heating and melting the mixture, and extruding it into continuous plastic filaments through a mold; stretching the plastic filaments to obtain flat filaments; winding the flat filaments, and then weaving them into a woven fabric; and sewing the woven fabric to obtain the plastic woven bag.

[0008] As one possible implementation, the heating and melting temperature is 250°C.

[0009] As one possible implementation, the mixing is carried out in a drying mixer; and / or, the extrusion into continuous plastic filaments is carried out in a drawing machine; and / or, the winding is carried out in a winding machine; and / or, the weaving into woven fabric is carried out in a weaving machine; and / or, the sewing of the woven fabric is carried out in a sewing machine.

[0010] Thirdly, the present invention provides the application of an aging-resistant plastic woven bag prepared by a method for preparing an aging-resistant plastic woven bag according to any possible implementation of the first aspect or any possible implementation of the second aspect in packaging materials.

[0011] As one possible implementation, the aging-resistant plastic woven bag is used to package any one of agricultural fertilizers, seeds, pesticides, and agricultural products.

[0012] As one possible implementation, the aging-resistant plastic woven bag can be used to package any of the industrial materials or industrial products.

[0013] The plastic woven bag provided by this invention has excellent tensile properties, wear resistance and aging resistance.

[0014] The method for preparing plastic woven bags provided by this invention is simple, uses inexpensive and readily available raw materials, and has low preparation cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The diagram shows the wear test results of plastic woven bag A and plastic woven bag a provided in the embodiments of the present invention, wherein the upper diagram is plastic woven bag A and the lower diagram is plastic woven bag a.

[0017] Figure 2 The diagram shows the wear test results of plastic woven bag B and plastic woven bag b provided in the embodiments of the present invention, wherein the upper diagram is plastic woven bag B and the lower diagram is plastic woven bag b.

[0018] Figure 3 The diagram shows the wear test results of plastic woven bag C and plastic woven bag c provided in the embodiments of the present invention, wherein the upper diagram is plastic woven bag C and the lower diagram is plastic woven bag c. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To address the problem that the strength and aging resistance of woven bags in the prior art are not ideal, this invention provides a method for preparing and testing aging-resistant plastic woven bags.

[0021] The technical solution of the present invention will be further described below with reference to specific embodiments.

[0022] Example 1

[0023] This embodiment provides a method for preparing an aging-resistant plastic woven bag.

[0024] 335 parts of polypropylene granules S100, 35 parts of polyethylene S331, 15 parts of recycled propylene film (new propylene film), 5 parts of calcium carbonate, 1.5 parts of anti-aging agent J990, and 1.5 parts of silica aerogel; all the above raw materials are poured into a raw material drying mixer and mixed evenly to obtain a mixture; the mixture is transferred to a wire drawing machine, heated and melted at 250°C, and extruded into continuous plastic filaments through a die; the plastic filaments are stretched (to orient their molecular chains and increase their strength) to obtain flat filaments; the flat filaments are wound up by a winding machine, and then woven into woven fabric by a weaving machine; the woven fabric is sewn by a sewing machine to obtain plastic woven bag A.

[0025] 350 parts of polypropylene granules S100, 15 parts of polyethylene S331, 10 parts of recycled propylene film (new propylene film), 10 parts of calcium carbonate, 1 part of antioxidant J990, and 1 part of silica aerogel; all the above raw materials are poured into a raw material drying mixer and mixed evenly to obtain a mixture; the mixture is transferred to a wire drawing machine, heated and melted at 250°C, and extruded into continuous plastic filaments through a die; the plastic filaments are stretched to obtain flat filaments; the flat filaments are wound up by a winding machine, and then woven into woven fabric by a weaving machine; the woven fabric is sewn by a sewing machine to obtain plastic woven bag B.

[0026] 342 parts of polypropylene granules S100, 25 parts of polyethylene S331, 5 parts of recycled propylene film (new propylene film), 15 parts of calcium carbonate, 0.5 parts of antioxidant J990, and 0.5 parts of silica aerogel; all the above raw materials are poured into a raw material drying mixer and mixed evenly to obtain a mixture; the mixture is transferred to a wire drawing machine, heated and melted at 250°C, and extruded into continuous plastic filaments through a die; the plastic filaments are stretched to obtain flat filaments; the flat filaments are wound up by a winding machine, and then woven into woven fabric by a weaving machine; the woven fabric is sewn by a sewing machine to obtain plastic woven bag C.

[0027] 335 parts of polypropylene granules S100, 35 parts of polyethylene S331, 15 parts of recycled propylene film (new propylene film), 5 parts of calcium carbonate, and 1.5 parts of antioxidant J990; all the above raw materials are poured into a raw material drying mixer and mixed evenly to obtain a mixture; the mixture is transferred to a wire drawing machine, heated and melted at 250°C, and extruded into continuous plastic filaments through a die; the plastic filaments are stretched to obtain flat filaments; the flat filaments are wound up by a winding machine, and then woven into woven fabric by a weaving machine; the woven fabric is sewn by a sewing machine to obtain a plastic woven bag a.

[0028] 350 parts of polypropylene granules S100, 15 parts of polyethylene S331, 10 parts of recycled propylene film (new propylene film), 10 parts of calcium carbonate, and 1 part of antioxidant J990; all the above raw materials are poured into a raw material drying mixer and mixed evenly to obtain a mixture; the mixture is transferred to a wire drawing machine, heated and melted at 250°C, and extruded into continuous plastic filaments through a die; the plastic filaments are stretched to obtain flat filaments; the flat filaments are wound up by a winding machine, and then woven into woven fabric by a weaving machine; the woven fabric is sewn by a sewing machine to obtain plastic woven bag b.

[0029] 342 parts of polypropylene granules S100, 25 parts of polyethylene S331, 5 parts of recycled propylene film (new propylene film), 15 parts of calcium carbonate, and 0.5 parts of antioxidant J990; all the above raw materials are poured into a raw material drying mixer and mixed evenly to obtain a mixture; the mixture is transferred to a wire drawing machine, heated and melted at 250°C, and extruded into continuous plastic filaments through a die; the plastic filaments are stretched to obtain flat filaments; the flat filaments are wound up by a winding machine, and then woven into woven fabric by a weaving machine; the woven fabric is sewn by a sewing machine to obtain a plastic woven bag c.

[0030] Example 2

[0031] This embodiment provides a performance testing experiment.

[0032] The plastic woven bags A, B, C, a, b, and c prepared in Example 1 were subjected to tensile property tests under a UV lamp B-313 with an illumination intensity of 0.65 W / m. 2 Under the conditions of / nm, 8h UV / 60℃, 4h condensation / 50℃, and light exposure at a spacing of 220mm for 72h, and stretching at a speed of approximately 100mm / min, the test results are shown in Table 1:

[0033] Table 1 Test Results

[0034]

[0035]

[0036] As shown in Table 1, plastic woven bags A, B, and C have excellent tensile properties.

[0037] Example 3

[0038] This embodiment provides a drop test experiment.

[0039] Drop tests were conducted on plastic woven bags A, B, C and a, b and c prepared in Example 1. The specific steps are as follows: Under normal temperature and humidity conditions, a drop tester was used to test the woven bags. The bags were filled with 50 kg of urea (filling coefficient of 80% to 85%) and the drop height was 3 m.

[0040] In this embodiment, plastic woven bags A, B, C, a, b, and c prepared in Example 1 were used as test bags for drop tests, and the results were as follows: Figure 1 , Figure 2 and Figure 3 The results are shown. (By...) Figures 1-3It can be seen that plastic woven bags A, B, and C all maintained their intact shape after the drop test, demonstrating good wear resistance.

[0041] Example 4

[0042] This embodiment provides an aging resistance test.

[0043] The plastic woven bags A, B, C, a, b, and c prepared in Example 1 were subjected to aging resistance tests. The specific steps are as follows: the six woven bags with different formulations were placed in an anti-ultraviolet accelerated aging tester and the experiment was conducted under simulated natural conditions with the same time setting.

[0044] Table 2 Results of Aging Resistance Tests

[0045]

[0046]

[0047] In this embodiment, plastic woven bags A, B, C, a, b, and c prepared in Example 1 were used as test bags for drop tests and antioxidant tests, respectively, and the results are shown in Table 2. Figure 1 , Figure 2 and Figure 3 The results are shown in Table 2 and... Figure 1 , Figure 2 and Figure 3 It can be seen that plastic woven bags A, B, and C all have superior UV resistance and aging resistance.

[0048] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0049] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An aging-resistant plastic woven bag, characterized in that, By weight, it includes the following components: 35-50 parts polypropylene particles, 15-35 parts polyethylene, 5-15 parts propylene film, 5-15 parts calcium carbonate, 0.5-1.5 parts anti-aging agent, and 0.5-1.5 parts silica aerogel.

2. The aging-resistant plastic woven bag according to claim 1, characterized in that, By weight, it includes the following components: 35 parts polypropylene particles, 35 parts polyethylene, 15 parts recycled propylene film, 5 parts calcium carbonate, 1.5 parts anti-aging agent, and 1.5 parts silica aerogel.

3. The method for preparing the aging-resistant plastic woven bag according to any one of claims 1 to 2, characterized in that, Includes the following steps: The raw materials are mixed according to the formula ratio to obtain a mixture; The mixture is heated and melted, and then extruded through a mold into continuous plastic filaments. The plastic filaments are then stretched to obtain flat filaments. The flat yarns are wound up and then woven into a woven fabric. The woven fabric is then sewn to obtain the plastic woven bag.

4. The preparation method according to claim 3, characterized in that, The heating and melting temperature is 250°C.

5. The preparation method according to claim 3, characterized in that, The mixing is carried out in a drying mixer; And / or, the extrusion into continuous plastic filaments is carried out in a drawing machine; And / or, the winding is performed in a winding machine; And / or, the weaving of the fabric is carried out on a weaving machine; And / or, the sewing of the woven fabric is carried out in a sewing machine.

6. The application of the aging-resistant plastic woven bag according to any one of claims 1 to 2 or the aging-resistant plastic woven bag prepared by the preparation method according to any one of claims 3 to 5 in packaging materials.

7. The application according to claim 6, characterized in that, The aging-resistant plastic woven bags are used for packaging any one of agricultural fertilizers, seeds, pesticides, and agricultural products.

8. The application according to claim 6, characterized in that, The aging-resistant plastic woven bags are used for packaging any one of industrial materials or industrial products.

Images