CN112644101A - Preparation method of composite plastic woven bag - Google Patents
Preparation method of composite plastic woven bag Download PDFInfo
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- CN112644101A CN112644101A CN202011515322.1A CN202011515322A CN112644101A CN 112644101 A CN112644101 A CN 112644101A CN 202011515322 A CN202011515322 A CN 202011515322A CN 112644101 A CN112644101 A CN 112644101A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/14—Printing or colouring
- B32B38/145—Printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
Abstract
The invention relates to a preparation method of a composite plastic woven bag, which comprises the following specific steps: preparing a plastic woven cloth base layer; using a biaxially oriented polypropylene material to prepare a three-layer structure film through coextrusion and biaxial orientation, extruding and casting polypropylene at the temperature of 250-260 ℃, rapidly cooling, crystallizing and solidifying the polypropylene into a thick sheet at the temperature of 10-20 ℃, longitudinally stretching the thick sheet at the temperature of 80-120 ℃, heat setting the thick sheet at the temperature of 100-150 ℃, transversely stretching the thick sheet, preheating the thick sheet, transversely stretching the thick sheet at the temperature of 150-180 ℃, and drawing and rolling the thick sheet at the speed of 300m/min at 150-300-; preparing a plastic film printing layer; and (3) hot-melting and pressing the plastic film printing layer, the plastic woven cloth base layer and the composite film together from top to bottom, then cutting and unidirectionally stretching the plastic film printing layer, and carrying out warp-weft weaving to obtain the composite plastic woven bag. The woven bag is prepared by compounding multiple layers, can improve the integral strength, toughness and bending strength, and is durable.
Description
Technical Field
The invention relates to the technical field of plastic woven bag preparation, in particular to a preparation method of a composite plastic woven bag.
Background
The plastic woven bag is divided into a polypropylene bag and a polyethylene bag according to the main material composition; the packaging material is divided into a bottom sewing bag and a side sewing bag according to a sewing method, and is a packaging material widely applied to the articles such as fertilizers, chemical products and the like at present. The main production process of the plastic woven bag is to extrude a film from a plastic raw material, cut and unidirectionally stretch the plastic raw material into flat filaments, and the flat filaments are woven by warps and wefts to obtain a product, which is generally called a woven bag.
The existing plastic woven bag is made of single flat filaments, and the formed woven bag finished product has single performance and lower strength and cannot meet the use requirements of some occasions.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a composite plastic woven bag.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a composite plastic woven bag comprises the following specific steps:
s1 preparation of plastic woven cloth base layer
Sending the finished flat filaments into a loom to be woven into woven cloth as a woven cloth base layer of the film;
s2 preparation of composite membrane
The method comprises the steps of using a biaxially oriented polypropylene material to prepare a three-layer structure film through coextrusion and biaxial orientation, extruding and casting polypropylene at the temperature of 250-260 ℃ during coextrusion, carrying out quenching crystallization at the temperature of 10-20 ℃ to solidify the polypropylene into a thick sheet, preheating at the temperature of 100-120 ℃, carrying out longitudinal orientation at the temperature of 80-120 ℃, wherein the stretching ratio is 4.5-5.5 times, carrying out heat setting at the temperature of 100-150 ℃, carrying out transverse orientation, preheating at the temperature of 200-210 ℃, carrying out transverse orientation at the temperature of 150-180 ℃ after preheating, wherein the transverse orientation ratio is 7.5-9.0 times, and carrying out traction and winding at the speed of 150-300 m/min;
s3 preparation of plastic film printing layer
Extruding materials from a die orifice of a spiral plastic extruder, adjusting the inlet and outlet amount of a cooling device, starting the cooling device, pulling a molten plastic cylinder extruded from the die orifice, kneading the molten plastic cylinder into a foam blank, flattening the kneaded part, putting a film into an upper traction rotary tractor and a winding device, adjusting the linear speed and the air compression amount of the tractor and the winding device, starting the upper traction rotary tractor and the winding device, and winding a plastic film printing layer through the winding device;
s4 composition
And (3) hot-melting and pressing the plastic film printing layer, the plastic woven cloth base layer and the composite film together from top to bottom, then cutting and unidirectionally stretching the plastic film printing layer, and carrying out warp-weft weaving to obtain the composite plastic woven bag.
And step S5, selecting gravure color press to print the needed pattern and character on the plastic film printing layer by high temperature ink.
In step S2, the thickness of the composite film is 15-18 μm.
In step S2, a modified masterbatch is added to the polypropylene material, and the modified masterbatch comprises the following components in parts by weight:
50-60 parts of inorganic powder; 1-2 parts of a coupling agent; 2-3 parts of a dispersing agent; 5-8 parts of a blending material; 1-5 parts of an antistatic agent; 1-2 parts of an antioxidant.
The inorganic powder in the modified master batch is nano-scale heavy calcium carbonate; the coupling agent is one of titanate, boric acid ester and aluminate; the dispersing agent is a mixture of stearic acid, paraffin wax and polyethylene wax; the blending material is polyethylene LDPE 5000S; the antistatic agent is an ethoxylated aliphatic alkylamine compound; the antioxidant is one or more of hindered amine antioxidant, hindered phenol antioxidant and metal deactivator.
In step S3, the temperature in the screw plastic extruder is controlled to be 140-160 ℃.
In step S4, the temperature of the hot melt lamination is 600-800 ℃.
The invention has the beneficial effects that: the woven bag is prepared by compounding multiple layers, can improve the integral strength, toughness and bending strength, and is durable.
Detailed Description
The invention will be further illustrated with reference to specific examples:
specific example 1:
a preparation method of a composite plastic woven bag comprises the following specific steps:
s1 preparation of plastic woven cloth base layer
Sending the finished flat filaments into a loom to be woven into woven cloth as a woven cloth base layer of the film;
s2 preparation of composite membrane
The method comprises the steps of using a biaxially oriented polypropylene material to prepare a three-layer structure film through coextrusion and biaxial orientation, extruding polypropylene into a cast sheet at the temperature of 250 ℃ during coextrusion, carrying out quenching crystallization at the temperature of 1 ℃ to solidify the polypropylene into a thick sheet, preheating at the temperature of 100 ℃, carrying out longitudinal orientation at the temperature of 80 ℃, wherein the stretching ratio is 4.5 times, carrying out heat setting at the temperature of 100 ℃, carrying out transverse orientation, preheating at the temperature of 200 ℃, carrying out transverse orientation at the temperature of 150 ℃ after preheating, wherein the transverse orientation ratio is 7.5 times, and carrying out traction and winding at the speed of 150 m/min;
s3 preparation of plastic film printing layer
Extruding materials from a die orifice of a spiral plastic extruder, adjusting the inlet and outlet amount of a cooling device, starting the cooling device, pulling a molten plastic cylinder extruded from the die orifice, kneading the molten plastic cylinder into a foam blank, flattening the kneaded part, putting a film into an upper traction rotary tractor and a winding device, adjusting the linear speed and the air compression amount of the tractor and the winding device, starting the upper traction rotary tractor and the winding device, and winding a plastic film printing layer through the winding device;
s4 composition
And (3) hot-melting and pressing the plastic film printing layer, the plastic woven cloth base layer and the composite film together from top to bottom, then cutting and unidirectionally stretching the plastic film printing layer, and carrying out warp-weft weaving to obtain the composite plastic woven bag.
And step S5, selecting gravure color press to print the needed pattern and character on the plastic film printing layer by high temperature ink.
In step S2, the thickness of the composite film produced was 15 μm.
In step S2, a modified masterbatch is added to the polypropylene material, and the modified masterbatch comprises the following components in parts by weight:
50 parts of inorganic powder; 1 part of a coupling agent; 2 parts of a dispersing agent; 5 parts of a blending material; 1 part of antistatic agent; and 1 part of antioxidant.
The inorganic powder in the modified master batch is nano-scale heavy calcium carbonate; the coupling agent is titanate; the dispersing agent is a mixture of stearic acid, paraffin wax and polyethylene wax; the blending material is polyethylene LDPE 5000S; the antistatic agent is an ethoxylated aliphatic alkylamine compound; the antioxidant is a mixture of hindered amine antioxidant and hindered phenol antioxidant.
In step S3, the temperature in the screw plastic extruder was controlled to 140 ℃.
In step S4, the temperature of the hot melt bonding is 600 ℃.
Specific example 2:
a preparation method of a composite plastic woven bag comprises the following specific steps:
s1 preparation of plastic woven cloth base layer
Sending the finished flat filaments into a loom to be woven into woven cloth as a woven cloth base layer of the film;
s2 preparation of composite membrane
The method comprises the steps of using a biaxially oriented polypropylene material to prepare a three-layer structure film through coextrusion and biaxial orientation, extruding polypropylene into a cast sheet at the temperature of 260 ℃ during coextrusion, carrying out quenching crystallization at the temperature of 20 ℃ to solidify the polypropylene into a thick sheet, preheating at the temperature of 120 ℃, carrying out longitudinal orientation at the temperature of 120 ℃, wherein the stretching ratio is 5.5 times, carrying out heat setting at the temperature of 150 ℃, carrying out transverse orientation, preheating at the temperature of 210 ℃, carrying out transverse orientation at the temperature of 180 ℃ after preheating, wherein the transverse orientation ratio is 9.0 times, and carrying out traction and winding at the speed of 300 m/min;
s3 preparation of plastic film printing layer
Extruding materials from a die orifice of a spiral plastic extruder, adjusting the inlet and outlet amount of a cooling device, starting the cooling device, pulling a molten plastic cylinder extruded from the die orifice, kneading the molten plastic cylinder into a foam blank, flattening the kneaded part, putting a film into an upper traction rotary tractor and a winding device, adjusting the linear speed and the air compression amount of the tractor and the winding device, starting the upper traction rotary tractor and the winding device, and winding a plastic film printing layer through the winding device;
s4 composition
And (3) hot-melting and pressing the plastic film printing layer, the plastic woven cloth base layer and the composite film together from top to bottom, then cutting and unidirectionally stretching the plastic film printing layer, and carrying out warp-weft weaving to obtain the composite plastic woven bag.
And step S5, selecting gravure color press to print the needed pattern and character on the plastic film printing layer by high temperature ink.
In step S2, the thickness of the composite film produced was 18 μm.
In step S2, a modified masterbatch is added to the polypropylene material, and the modified masterbatch comprises the following components in parts by weight:
60 parts of inorganic powder; 2 parts of a coupling agent; 3 parts of a dispersing agent; 8 parts of a blending material; 5 parts of an antistatic agent; and 2 parts of an antioxidant.
The inorganic powder in the modified master batch is nano-scale heavy calcium carbonate; the coupling agent is boric acid ester; the dispersing agent is a mixture of stearic acid, paraffin wax and polyethylene wax; the blending material is polyethylene LDPE 5000S; the antistatic agent is an ethoxylated aliphatic alkylamine compound; the antioxidant is a metal passivator.
In step S3, the temperature in the screw plastic extruder was controlled to 160 ℃.
In step S4, the temperature of the hot melt bonding is 800 ℃.
Specific example 3:
a preparation method of a composite plastic woven bag comprises the following specific steps:
s1 preparation of plastic woven cloth base layer
Sending the finished flat filaments into a loom to be woven into woven cloth as a woven cloth base layer of the film;
s2 preparation of composite membrane
The method comprises the steps of using a biaxially oriented polypropylene material to prepare a three-layer structure film through coextrusion and biaxial orientation, extruding polypropylene into a cast sheet at the temperature of 255 ℃ during coextrusion, carrying out quenching crystallization at the temperature of 15 ℃ to solidify the polypropylene into a thick sheet, preheating at the temperature of 110 ℃, carrying out longitudinal orientation at the temperature of 100 ℃, leading the stretching ratio to be 5 times, carrying out heat setting at the temperature of 120 ℃, carrying out transverse orientation, preheating at the temperature of 205 ℃, carrying out transverse orientation at the temperature of 160 ℃ after preheating, leading the transverse orientation ratio to be 8 times, and carrying out traction and rolling at the speed of 200 m/min;
s3 preparation of plastic film printing layer
Extruding materials from a die orifice of a spiral plastic extruder, adjusting the inlet and outlet amount of a cooling device, starting the cooling device, pulling a molten plastic cylinder extruded from the die orifice, kneading the molten plastic cylinder into a foam blank, flattening the kneaded part, putting a film into an upper traction rotary tractor and a winding device, adjusting the linear speed and the air compression amount of the tractor and the winding device, starting the upper traction rotary tractor and the winding device, and winding a plastic film printing layer through the winding device;
s4 composition
And (3) hot-melting and pressing the plastic film printing layer, the plastic woven cloth base layer and the composite film together from top to bottom, then cutting and unidirectionally stretching the plastic film printing layer, and carrying out warp-weft weaving to obtain the composite plastic woven bag.
And step S5, selecting gravure color press to print the needed pattern and character on the plastic film printing layer by high temperature ink.
In step S2, the thickness of the composite film produced was 16 μm.
In step S2, a modified masterbatch is added to the polypropylene material, and the modified masterbatch comprises the following components in parts by weight:
55 parts of inorganic powder; 2 parts of a coupling agent; 3 parts of a dispersing agent; 6 parts of a blending material; 3 parts of an antistatic agent; and 1 part of antioxidant.
The inorganic powder in the modified master batch is nano-scale heavy calcium carbonate; the coupling agent is aluminate; the dispersing agent is a mixture of stearic acid, paraffin wax and polyethylene wax; the blending material is polyethylene LDPE 5000S; the antistatic agent is an ethoxylated aliphatic alkylamine compound; the antioxidant is a mixture of hindered amine antioxidant, hindered phenol antioxidant and metal deactivator.
In step S3, the temperature in the screw plastic extruder was controlled to 150 ℃.
In step S4, the temperature of the hot melt bonding is 700 ℃.
The woven bag is prepared by compounding multiple layers, can improve the integral strength, toughness and bending strength, and is durable.
The present invention has been described in connection with the specific embodiments, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and it is within the protection scope of the present invention as long as various modifications are made by using the method concept and technical solution of the present invention, or the present invention is directly applied to other occasions without modification.
Claims (7)
1. A preparation method of a composite plastic woven bag is characterized by comprising the following specific steps:
s1 preparation of plastic woven cloth base layer
Sending the finished flat filaments into a loom to be woven into woven cloth as a woven cloth base layer of the film;
s2 preparation of composite membrane
The method comprises the steps of using a biaxially oriented polypropylene material to prepare a three-layer structure film through coextrusion and biaxial orientation, extruding and casting polypropylene at the temperature of 250-260 ℃ during coextrusion, carrying out quenching crystallization at the temperature of 10-20 ℃ to solidify the polypropylene into a thick sheet, preheating at the temperature of 100-120 ℃, carrying out longitudinal orientation at the temperature of 80-120 ℃, wherein the stretching ratio is 4.5-5.5 times, carrying out heat setting at the temperature of 100-150 ℃, carrying out transverse orientation, preheating at the temperature of 200-210 ℃, carrying out transverse orientation at the temperature of 150-180 ℃ after preheating, wherein the transverse orientation ratio is 7.5-9.0 times, and carrying out traction and winding at the speed of 150-300 m/min;
s3 preparation of plastic film printing layer
Extruding materials from a die orifice of a spiral plastic extruder, adjusting the inlet and outlet amount of a cooling device, starting the cooling device, pulling a molten plastic cylinder extruded from the die orifice, kneading the molten plastic cylinder into a foam blank, flattening the kneaded part, putting a film into an upper traction rotary tractor and a winding device, adjusting the linear speed and the air compression amount of the tractor and the winding device, starting the upper traction rotary tractor and the winding device, and winding a plastic film printing layer through the winding device;
s4 composition
And (3) hot-melting and pressing the plastic film printing layer, the plastic woven cloth base layer and the composite film together from top to bottom, then cutting and unidirectionally stretching the plastic film printing layer, and carrying out warp-weft weaving to obtain the composite plastic woven bag.
2. The method of claim 1, further comprising a step S5 of printing desired patterns and characters on the plastic film printing layer by using high temperature ink with a gravure color printer.
3. The method as claimed in claim 2, wherein the thickness of the composite film formed in step S2 is 15-18 μm.
4. The method for preparing a composite plastic woven bag according to claim 3, wherein in step S2, a modified master batch is added to the polypropylene material, and the modified master batch comprises the following components in parts by weight:
50-60 parts of inorganic powder; 1-2 parts of a coupling agent; 2-3 parts of a dispersing agent; 5-8 parts of a blending material; 1-5 parts of an antistatic agent; 1-2 parts of an antioxidant.
5. The method for preparing the composite plastic woven bag according to claim 4, wherein the inorganic powder in the modified master batch is nano-scale heavy calcium carbonate; the coupling agent is one of titanate, boric acid ester and aluminate; the dispersing agent is a mixture of stearic acid, paraffin wax and polyethylene wax; the blending material is polyethylene LDPE 5000S; the antistatic agent is an ethoxylated aliphatic alkylamine compound; the antioxidant is one or more of hindered amine antioxidant, hindered phenol antioxidant and metal deactivator.
6. The method as claimed in claim 5, wherein the temperature in the spiral plastic extruder is controlled to be 140-160 ℃ in step S3.
7. The method as claimed in claim 6, wherein the temperature of the thermal fusion bonding in step S4 is 600-800 ℃.
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| CN202011515322.1A CN112644101A (en) | 2020-12-21 | 2020-12-21 | Preparation method of composite plastic woven bag |
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| CN202011515322.1A CN112644101A (en) | 2020-12-21 | 2020-12-21 | Preparation method of composite plastic woven bag |
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