CN115895289A - Preparation process of high-opening 3D concave-convex novel plastic-absorbing net - Google Patents
Preparation process of high-opening 3D concave-convex novel plastic-absorbing net Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 66
- 229920003023 plastic Polymers 0.000 claims abstract description 52
- 239000004033 plastic Substances 0.000 claims abstract description 52
- 239000010902 straw Substances 0.000 claims abstract description 34
- 238000001125 extrusion Methods 0.000 claims abstract description 30
- -1 polyethylene Polymers 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 27
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- 238000000227 grinding Methods 0.000 claims abstract description 13
- CHHHXKFHOYLYRE-UHFFFAOYSA-M 2,4-Hexadienoic acid, potassium salt (1:1), (2E,4E)- Chemical compound [K+].CC=CC=CC([O-])=O CHHHXKFHOYLYRE-UHFFFAOYSA-M 0.000 claims abstract description 11
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- 239000004698 Polyethylene Substances 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 11
- 235000020232 peanut Nutrition 0.000 claims abstract description 11
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- 239000004302 potassium sorbate Substances 0.000 claims abstract description 11
- 229940069338 potassium sorbate Drugs 0.000 claims abstract description 11
- 235000010241 potassium sorbate Nutrition 0.000 claims abstract description 11
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 11
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000002985 plastic film Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 23
- 229920001577 copolymer Polymers 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 15
- 239000012745 toughening agent Substances 0.000 claims description 15
- 239000007822 coupling agent Substances 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- LHWIBZQIEODOQQ-UHFFFAOYSA-H S(=O)(=O)([O-])[O-].C(CCC)[Sn+3].S(=O)(=O)([O-])[O-].S(=O)(=O)([O-])[O-].C(CCC)[Sn+3] Chemical compound S(=O)(=O)([O-])[O-].C(CCC)[Sn+3].S(=O)(=O)([O-])[O-].S(=O)(=O)([O-])[O-].C(CCC)[Sn+3] LHWIBZQIEODOQQ-UHFFFAOYSA-H 0.000 claims description 10
- 239000003963 antioxidant agent Substances 0.000 claims description 10
- 230000003078 antioxidant effect Effects 0.000 claims description 10
- HNBDRPTVWVGKBR-UHFFFAOYSA-N n-pentanoic acid methyl ester Natural products CCCCC(=O)OC HNBDRPTVWVGKBR-UHFFFAOYSA-N 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 229920000058 polyacrylate Polymers 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 5
- 150000008052 alkyl sulfonates Chemical class 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 229920000379 polypropylene carbonate Polymers 0.000 claims description 5
- 229920005653 propylene-ethylene copolymer Polymers 0.000 claims description 5
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 5
- WEAPVABOECTMGR-UHFFFAOYSA-N triethyl 2-acetyloxypropane-1,2,3-tricarboxylate Chemical compound CCOC(=O)CC(C(=O)OCC)(OC(C)=O)CC(=O)OCC WEAPVABOECTMGR-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
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- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 claims 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 2
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- 230000000694 effects Effects 0.000 description 15
- 239000000126 substance Substances 0.000 description 11
- 239000006087 Silane Coupling Agent Substances 0.000 description 8
- 239000006082 mold release agent Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000007666 vacuum forming Methods 0.000 description 4
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- QQGISFDJEJMKIL-JAIQZWGSSA-N (5z)-5-[[3-(hydroxymethyl)thiophen-2-yl]methylidene]-10-methoxy-2,2,4-trimethyl-1h-chromeno[3,4-f]quinolin-9-ol Chemical group C1=CC=2NC(C)(C)C=C(C)C=2C2=C1C=1C(OC)=C(O)C=CC=1O\C2=C/C=1SC=CC=1CO QQGISFDJEJMKIL-JAIQZWGSSA-N 0.000 description 1
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 229920005586 poly(adipic acid) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
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Abstract
The invention discloses a preparation process of a high-opening 3D concave-convex novel plastic suction net, belonging to the technical field of plastic suction net preparation, and comprising the following steps of S1, raw material preparation: weighing the raw materials in parts by weight; s2, preparing a basic blend: grinding straws and blending the ground straws with peanut protein powder, lignocellulose, glycidyl methacrylate modified polyethylene, potassium sorbate and a compatilizer to obtain a basic blend; s3, preparing base particles: mixing the cooled basic blend with the rest raw materials, and crushing to obtain basic particles; s4, preparing a plastic sheet: putting the basic particles into an extruder for extrusion molding to obtain a plastic sheet; s5, plastic suction forming: the method comprises the steps of placing the plastic-absorbing sheet into a plastic-absorbing machine for plastic-absorbing molding to obtain a concave-convex sheet, and then, carrying out hole notching and cutting on the concave-convex sheet to obtain the concave-convex plastic-absorbing net.
Description
Technical Field
The invention relates to the technical field of plastic suction net preparation, in particular to a preparation process of a high-opening 3D concave-convex novel plastic suction net.
Background
A technology for processing plastics includes such steps as heating the hard plastic sheet to become soft, vacuum adsorption on the surface of mould, cooling and shaping.
The plastic uptake package has the main advantages of saving raw and auxiliary materials, light weight, convenient transportation and good sealing performance, and meets the requirements of environment-friendly green package; any special-shaped product can be packaged, and no additional buffer material is needed for boxing; the packaged product is transparent and visible, has beautiful appearance, is convenient to sell, is suitable for mechanized and automatic packaging, is convenient for modern management, saves manpower and improves efficiency.
Vacuum Forming (Vacuum Forming), commonly called as plastic suction, is a plastic processing technology, and mainly adopts the principle that after a flat plastic hard sheet is heated to be soft, the plastic hard sheet is adsorbed on the surface of a mold by Vacuum, and is formed after being cooled;
the vacuum forming is that the thermoplastic plastic plate and sheet are fixed on the mould, and heated by radiation heater to softening temperature, then the air between the mould and plate is pumped by vacuum pump to make the plate parison form according to the mould contour, and with the increase of vacuum degree, the product is cooled and formed, and then blown out from the mould by compressed air to demould.
The existing blister products are boxed and mainly used for lunch boxes and packing boxes, but some special products need to be prepared into nets by carving holes, such as lattices among red wine in the whole box and blister nets needed for fixing, the used blister nets are not plane net structures, concave-convex net structures can be better fixed, and the existing blister nets have better use effects, and have the problems of more complicated preparation process and high raw material cost;
along with the use of a large amount of plastic products, a large amount of non-degradable plastic boxes are difficult to degrade when entering the environment, so that a concave-convex plastic net which is good in degradable mechanical property and difficult to tear is needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a preparation process of a high-opening 3D concave-convex novel plastic suction net.
The technical scheme of the invention is as follows: the preparation process of the high-opening 3D concave-convex novel plastic suction net is characterized by comprising the following steps of:
s1, preparing raw materials:
taking 50-60 parts of straw, 30-40 parts of peanut protein powder, 15-20 parts of lignocellulose, 7-9 parts of polyvinyl alcohol, 4-8 parts of potassium sorbate, 3-5 parts of acetyl tributyl citrate, 1-3 parts of a compatilizer, 5-10 parts of glycidyl methacrylate modified polyethylene, 7-8 parts of modified POE-8200 ethylene octene copolymer, 0.5-2 parts of a composite toughening agent, 1-1.5 parts of 4-sodium methyl valerate, 0.5-1 part of butyl tin sulfate, 1-3 parts of an antioxidant TH-1790 and 1-2.5 parts of a coupling agent according to the following parts by weight;
s2, preparing a basic blend:
exposing the straws in the step S1 to the sun until the moisture content of the straws reaches 1-3%, then placing the straws in a grinder for grinding at the grinding speed of 200-300r/min for 1-2h to obtain straw powder, placing the straw powder, peanut protein powder, lignocellulose, glycidyl methacrylate modified polyethylene, potassium sorbate and a compatilizer in a mixer according to the weight parts, and mixing to obtain a basic blend;
s3, preparing base particles:
cooling the basic blend obtained in the step S2 to room temperature, putting the basic blend, acetyl tributyl citrate, the modified POE-8200 ethylene octene copolymer, polyvinyl alcohol, a composite toughening agent, 4-sodium methyl valerate, butyl tin sulfate, an antioxidant TH-1790 and a coupling agent into a mixer for mixing, drying after mixing, cooling to room temperature after drying, and crushing to obtain basic particles;
s4, preparing a plastic sheet:
putting the basic particles obtained in the step S3 into an extruder for extrusion molding, and performing water cooling after extrusion to obtain a blister sheet;
s5, plastic uptake forming:
and (4) heating the plastic-uptake sheet obtained in the step (S4) in a plastic-uptake machine, vacuumizing, softening the plastic-uptake sheet, adsorbing the plastic-uptake sheet to a mold by using pressure difference for plastic-uptake molding, obtaining a concave-convex sheet after the plastic-uptake molding, carrying out air cooling on the concave-convex sheet, carrying out hole carving on the concave-convex sheet by using a hole carving machine after the air cooling is finished, cutting after the hole carving is finished, and obtaining the concave-convex plastic-uptake net after the cutting is finished.
Further, the mixing speed of the mixer in the step S2 is 100-120r/min, the mixing temperature is 70-80 ℃, and the mixing time is 40-70min, so that the basic blend obtained under the technical parameters is mixed more uniformly.
Further, the mixing speed in the step S3 is 80-100r/min, the mixing temperature is 90-100 ℃, and the mixing time is 1-2h, so that the substances can be effectively mixed with each other at the mixing speed and the mixing temperature, and the base particles with uniform texture can be obtained.
Further, the drying temperature in the step S3 is 105-110 ℃, the drying time is 1-2h, and the drying effect is better.
Further, in the step S4, the extrusion temperature of the extruder is 130-150 ℃, the extrusion speed is 1-2m/min, the extrusion pressure is 15-20Mpa, and the extruder has good extrusion effect and high efficiency.
Further, a mold release agent is coated on the mold on the plastic suction machine in the step S5, and the mold release agent consists of the following components in parts by weight: 1-3 parts of alkyl sulfonate, 4-7 parts of alkylbenzene sulfonate, 2-5 parts of polyoxyethylene sorbitan fatty acid ester, 7-8 parts of acetyl triethyl citrate and 9-10 parts of sodium stearate, so that the concave-convex sheet can be conveniently separated from the die, and the concave-convex sheet and the die are prevented from being adhered to each other.
Further, the air cooling temperature in the step S5 is 5-10 ℃, the air cooling speed is 2-3m/S, the number of the engraving holes of the engraving machine is 10-20, the engraving speed is 10-20 times/min, the heating temperature of the plastic-absorbing machine is 150-240 ℃, the working pressure of the plastic-absorbing machine is 0.5-0.6MPa, and under the technical parameters, the plastic-absorbing effect of the plastic-absorbing machine is good, and the working efficiency is highest.
Further, the composite toughening agent is prepared from polypropylene carbonate, ethylene copolymer and polybutylene adipate/terephthalate copolymer according to the mass ratio of 1:1:1, the toughening effect is good, and the prepared plastic suction net is not easy to tear.
Further, the compatilizer is prepared by mixing modified polyacrylate and amino-terminated polyurethane in a mass ratio of 5:1, the compatilizer increases the thickness of an interface layer, increases the bonding force among phases, improves the thermal stability and increases the stress transfer efficiency.
Further, the coupling agent is prepared by mixing a silane coupling agent KH570 and a silane coupling agent LM-N308 in a mass ratio of 2:1, the adhesive property of the surfaces of all the substances is improved, and the tensile strength of the plastic-absorbing net is further improved.
The invention has the beneficial effects that:
(1) The plastic suction net prepared by the invention has the characteristics of high strength, good toughness and difficult tearing, and has good effect in practical application.
(2) The raw materials for preparing the plastic absorption net comprise the straws, and the straws are easy to decompose, can be quickly degraded in nature, have small influence on environmental pollution and are beneficial to environmental protection.
Drawings
FIG. 1 is a flow chart of the preparation of the present invention.
Detailed Description
Example 1:
as shown in fig. 1, the preparation process of the novel high-open-pore 3D concave-convex plastic suction net is characterized by comprising the following steps:
s1, preparing raw materials:
taking 50 parts of straw, 30 parts of peanut protein powder, 15 parts of lignocellulose, 7-9 parts of polyvinyl alcohol, 4 parts of potassium sorbate, 3 parts of acetyl tributyl citrate, 1 part of compatilizer, 5 parts of glycidyl methacrylate modified polyethylene, 7 parts of modified POE-8200 ethylene octene copolymer, 0.5 part of composite toughening agent, 1 part of 4-sodium methyl valerate, 0.5 part of butyl tin sulfate, 1 part of antioxidant TH-1790 and 1 part of coupling agent according to the following weight parts; the modified POE-8200 ethylene octene copolymer is a product of the United states DOW chemical company;
the composite toughening agent is prepared from polypropylene carbonate, ethylene copolymer and polybutylene adipate/terephthalate copolymer according to the mass ratio of 1:1:1, the toughening effect is good, and the prepared plastic net is not easy to tear;
the compatilizer is prepared from modified polyacrylate and amino-terminated polyurethane according to a mass ratio of 5:1, the compatilizer is prepared by blending, the thickness of an interface layer is increased, the bonding force among phases is increased, the thermal stability is improved, and the stress transfer efficiency is increased;
the coupling agent is prepared from a silane coupling agent KH570 and a silane coupling agent LM-N308 in a mass ratio of 2:1, the adhesive property of the surfaces of all substances is improved, and the tensile strength of the plastic-absorbing net is further improved;
s2, preparing a basic blend:
the method comprises the following steps of (1) exposing the straws in the step (S1) to the sun until the moisture content of the straws is 1%, then placing the straws in a grinding machine for grinding at a grinding speed of 200r/min for 1h to obtain straw powder, placing the straw powder, peanut protein powder, lignocellulose, glycidyl methacrylate modified polyethylene, potassium sorbate and a compatilizer in a mixer for mixing according to the weight parts, wherein the mixing speed of the mixer is 100r/min, the mixing temperature is 70 ℃ and the mixing time is 40min, so that the obtained basic blend is mixed more uniformly, and the basic blend is obtained after the mixing is finished;
s3, preparing base particles:
cooling the basic blend obtained in the step S2 to room temperature, then putting the basic blend, acetyl tributyl citrate, a modified POE-8200 ethylene octene copolymer, polyvinyl alcohol, a composite toughening agent, 4-sodium methyl valerate, butyl tin sulfate, an antioxidant TH-1790 and a coupling agent into a mixer for mixing, wherein the mixing speed is 80r/min, the mixing temperature is 90 ℃, the mixing duration is 1h, the mixing speed and the mixing temperature can effectively enable the substances to be mutually mixed and mixed to obtain basic particles with uniform texture, drying is carried out after the mixing is finished, the drying temperature is 105 ℃, the drying duration is 1h, the drying effect is better, and the basic particles are obtained by cooling to room temperature and crushing after the drying;
s4, preparing a plastic sheet:
putting the basic particles obtained in the step S3 into an extruder for extrusion molding, wherein the extrusion temperature of the extruder is 130 ℃, the extrusion speed is 1m/min, the extrusion pressure is 15Mpa, the extrusion effect of the extruder is good, the efficiency is high, and water cooling is performed after extrusion to obtain a blister sheet;
s5, plastic uptake forming:
and (2) putting the plastic-absorbing sheet obtained in the step (S4) into a plastic-absorbing machine, heating, vacuumizing, softening the plastic-absorbing sheet, adsorbing the plastic-absorbing sheet onto a mold by using pressure difference for plastic-absorbing molding, wherein the heating temperature of the plastic-absorbing machine is 150 ℃, the working pressure of the plastic-absorbing machine is 0.5Mpa, the concave-convex sheet is obtained after the plastic-absorbing molding, the concave-convex sheet is subjected to air cooling, the air cooling temperature is 5 ℃, the air cooling wind speed is 2m/S, the concave-convex sheet is subjected to hole carving on the concave-convex sheet by a hole carving machine after the air cooling is finished, the number of the carved holes of the hole carving machine is 10, the hole carving speed is 10 times/min, cutting is carried out after the hole carving is finished, and the concave-convex plastic-absorbing net is obtained after the cutting is finished.
Example 2:
as shown in fig. 1, the preparation process of the novel high-open-pore 3D concave-convex plastic suction net is characterized by comprising the following steps:
s1, preparing raw materials:
taking 55 parts of straw, 35 parts of peanut protein powder, 18 parts of lignocellulose, 8 parts of polyvinyl alcohol, 6 parts of potassium sorbate, 4 parts of acetyl tributyl citrate, 2 parts of compatilizer, 8 parts of glycidyl methacrylate modified polyethylene, 7.5 parts of modified POE-8200 ethylene octene copolymer, 1 part of composite toughening agent, 1.3 parts of 4-sodium methyl valerate, 0.8 part of butyl tin sulfate, 2 parts of antioxidant TH-1790 and 2 parts of coupling agent according to the following weight parts; the modified POE-8200 ethylene octene copolymer is a product of the United states DOW chemical company;
the composite toughening agent is prepared from polypropylene carbonate, ethylene copolymer and poly (adipic acid)/butylene terephthalate copolymer according to the mass ratio of 1:1:1, the toughening effect is good, and the prepared plastic net is not easy to tear;
the compatilizer is prepared from modified polyacrylate and amino-terminated polyurethane according to a mass ratio of 5:1, the compatilizer is prepared by blending, the thickness of an interface layer is increased, the bonding force among phases is increased, the thermal stability is improved, and the stress transfer efficiency is increased;
the coupling agent is prepared from a silane coupling agent KH570 and a silane coupling agent LM-N308 according to a mass ratio of 2:1, the adhesive property of the surfaces of all substances is improved, and the tensile strength of the plastic-absorbing net is further improved;
s2, preparing a basic blend:
exposing the straws in the step S1 in the sun until the moisture content of the straws reaches 2%, then placing the straws in a grinder for grinding at a grinding speed of 250r/min for 1.5h to obtain straw powder, and placing the straw powder, peanut protein powder, lignocellulose, glycidyl methacrylate modified polyethylene, potassium sorbate and a compatilizer into a mixer for mixing according to the weight parts, wherein the mixing speed of the mixer is 110r/min, the mixing temperature is 75 ℃ and the mixing time is 50min, so that the obtained basic blend is mixed more uniformly, and the basic blend is obtained after mixing;
s3, preparing base particles:
cooling the basic blend obtained in the step S2 to room temperature, then putting the basic blend, acetyl tributyl citrate, a modified POE-8200 ethylene octene copolymer, polyvinyl alcohol, a composite toughening agent, 4-sodium methyl valerate, butyl tin sulfate, an antioxidant TH-1790 and a coupling agent into a mixer for mixing, wherein the mixing speed is 90r/min, the mixing temperature is 95 ℃, and the mixing duration is 1.5h, so that the substances can be effectively mixed with one another at the mixing speed and the mixing temperature to obtain basic particles with uniform texture, drying the mixed basic particles after the mixing is finished, the drying temperature is 108 ℃, the drying duration is 1.5h, the drying effect is better, and cooling to room temperature for crushing to obtain the basic particles;
s4, preparing a plastic sheet:
putting the basic particles obtained in the step S3 into an extruder for extrusion molding, wherein the extrusion temperature of the extruder is 140 ℃, the extrusion speed is 1.5m/min, the extrusion pressure is 18Mpa, the extrusion effect of the extruder is good, the efficiency is high, and water cooling is carried out after extrusion to obtain the blister sheet;
s5, plastic uptake forming:
and (5) putting the plastic uptake sheet obtained in the step (S4) into a plastic uptake machine, heating, vacuumizing, softening the plastic uptake sheet, adsorbing the plastic uptake sheet onto a mold by using pressure difference for plastic uptake molding, wherein the heating temperature of the plastic uptake machine is 200 ℃, the working pressure of the plastic uptake machine is 0.55Mpa, obtaining concave and convex sheets after the plastic uptake molding, carrying out air cooling on the concave and convex sheets, the air cooling temperature is 8 ℃, the air cooling wind speed is 2.5m/S, carrying out hole carving on the concave and convex sheets by a hole carving machine after the air cooling is finished, wherein the number of hole carving openings of the hole carving machine is 15, the hole carving speed is 15 times/min, cutting is carried out after the hole carving is finished, and obtaining the concave and convex plastic uptake net after the cutting is finished.
Example 3:
as shown in fig. 1, the preparation process of the novel high-open-pore 3D concave-convex plastic suction net is characterized by comprising the following steps:
s1, preparing raw materials:
taking 60 parts of straw, 40 parts of peanut protein powder, 20 parts of lignocellulose, 9 parts of polyvinyl alcohol, 8 parts of potassium sorbate, 5 parts of acetyl tributyl citrate, 3 parts of a compatilizer, 10 parts of glycidyl methacrylate modified polyethylene, 8 parts of modified POE-8200 ethylene octene copolymer, 2 parts of a composite toughening agent, 1.5 parts of 4-sodium methyl valerate, 1 part of butyl tin sulfate, 3 parts of an antioxidant TH-1790 and 2.5 parts of a coupling agent; the modified POE-8200 ethylene octene copolymer is a product of the United states DOW chemical company;
the composite toughening agent is prepared from polypropylene carbonate, ethylene copolymer and polybutylene adipate/terephthalate copolymer according to the mass ratio of 1:1:1, the toughening effect is good, and the prepared plastic net is not easy to tear;
the compatilizer is prepared from modified polyacrylate and amino-terminated polyurethane according to a mass ratio of 5:1, the compatilizer is prepared by blending, the thickness of an interface layer is increased, the bonding force among phases is increased, the thermal stability is improved, and the stress transfer efficiency is increased;
the coupling agent is prepared from a silane coupling agent KH570 and a silane coupling agent LM-N308 according to a mass ratio of 2:1, the adhesive property of the surfaces of all substances is improved, and the tensile strength of the plastic-absorbing net is further improved;
s2, preparing a basic blend:
exposing the straws in the step S1 to the sun until the moisture content of the straws is 3%, then placing the straws in a grinding machine for grinding at a grinding speed of 300r/min for 1-2h to obtain straw powder, placing the straw powder, peanut protein powder, lignocellulose, glycidyl methacrylate modified polyethylene, potassium sorbate and a compatilizer in parts by weight into a mixer for mixing, wherein the mixing speed of the mixer is 120r/min, the mixing temperature is 80 ℃ and the mixing time is 70min, the obtained basic blend is more uniformly mixed under the technical parameters, and the basic blend is obtained after mixing is finished;
s3, preparing base particles:
cooling the basic blend obtained in the step S2 to room temperature, then putting the basic blend, acetyl tributyl citrate, a modified POE-8200 ethylene octene copolymer, polyvinyl alcohol, a composite toughening agent, 4-sodium methyl valerate, butyl tin sulfate, an antioxidant TH-1790 and a coupling agent into a mixer for mixing, wherein the mixing speed is 100r/min, the mixing temperature is 100 ℃, the mixing duration is 2 hours, the mixing speed and the mixing temperature can effectively enable the substances to be mutually mixed and mixed to obtain basic particles with uniform texture, drying is carried out after the mixing is finished, the drying temperature is 110 ℃, the drying duration is 2 hours, the drying effect is better, and the basic particles are obtained by cooling to room temperature and crushing after the drying;
s4, preparing a plastic sheet:
putting the basic particles obtained in the step S3 into an extruder for extrusion molding, wherein the extrusion temperature of the extruder is 150 ℃, the extrusion speed is 2m/min, the extrusion pressure is 20Mpa, the extrusion effect of the extruder is good, the efficiency is high, and water cooling is performed after extrusion to obtain a blister sheet;
s5, plastic uptake forming:
and (5) putting the plastic-absorbing sheet obtained in the step (S4) into a plastic-absorbing machine, heating, vacuumizing, softening the plastic-absorbing sheet, adsorbing the plastic-absorbing sheet onto a mold by using pressure difference for plastic-absorbing forming, wherein the heating temperature of the plastic-absorbing machine is 240 ℃, the working pressure of the plastic-absorbing machine is 0.6Mpa, obtaining concave-convex sheets after plastic-absorbing forming, carrying out air cooling on the concave-convex sheets, wherein the air cooling temperature is 10 ℃, the air cooling wind speed is 3m/S, carrying out hole carving on the concave-convex sheets by a hole carving machine after the air cooling is finished, wherein the number of the carved holes of the hole carving machine is 20, the hole carving speed is 20 times/min, cutting is carried out after the hole carving is finished, and obtaining the concave-convex plastic-absorbing net after the cutting is finished.
Comparative examples 1 to 3
Example 4:
on the basis of the example 3, in the step S5 of the example 4, a mold release agent is coated on the mold of the vacuum forming machine, and the mold release agent consists of the following components in parts by weight: 1 part of alkyl sulfonate, 4 parts of alkylbenzene sulfonate, 2 parts of polyoxyethylene sorbitan fatty acid ester, 7 parts of acetyl triethyl citrate and 9 parts of sodium stearate.
Example 5:
on the basis of example 3, in example 5, the mold on the vacuum molding machine in step S5 was coated with a release agent, which was composed of the following components in parts by weight: 2 parts of alkyl sulfonate, 5 parts of alkylbenzene sulfonate, 3 parts of polyoxyethylene sorbitan fatty acid ester, 7.5 parts of acetyl triethyl citrate and 9.5 parts of sodium stearate.
Example 6:
on the basis of example 3, the mold on the vacuum molding machine of step S5 in example 6 was coated with a release agent, which was composed of the following components in parts by weight: 3 parts of alkyl sulfonate, 7 parts of alkylbenzene sulfonate, 5 parts of polyoxyethylene sorbitan fatty acid ester, 8 parts of acetyl triethyl citrate and 10 parts of sodium stearate.
Comparing example 4 to example 6, the mold release agent in example 6 was more effective in mold release, and therefore example 6 was the best example.
Claims (10)
1. The preparation process of the high-opening-hole 3D concave-convex novel plastic suction net is characterized by comprising the following steps of:
s1, preparing raw materials:
taking 50-60 parts of straw, 30-40 parts of peanut protein powder, 15-20 parts of lignocellulose, 7-9 parts of polyvinyl alcohol, 4-8 parts of potassium sorbate, 3-5 parts of acetyl tributyl citrate, 1-3 parts of a compatilizer, 5-10 parts of glycidyl methacrylate modified polyethylene, 7-8 parts of modified POE-8200 ethylene octene copolymer, 0.5-2 parts of a composite toughening agent, 1-1.5 parts of 4-sodium methyl valerate, 0.5-1 part of butyl tin sulfate, 1-3 parts of an antioxidant TH-1790 and 1-2.5 parts of a coupling agent according to the following parts by weight;
s2, preparing a basic blend:
exposing the straws in the step S1 to the sun until the moisture content of the straws is 1-3%, then placing the straws in a grinder for grinding at the grinding speed of 200-300r/min for 1-2h to obtain straw powder, placing the straw powder, peanut protein powder, lignocellulose, glycidyl methacrylate modified polyethylene, potassium sorbate and a compatilizer in a mixer according to the parts by weight to mix, and obtaining a basic blend after mixing;
s3, preparing base particles:
cooling the basic blend obtained in the step S2 to room temperature, putting the basic blend, acetyl tributyl citrate, the modified POE-8200 ethylene octene copolymer, polyvinyl alcohol, a composite toughening agent, 4-sodium methyl valerate, butyl tin sulfate, an antioxidant TH-1790 and a coupling agent into a mixer for mixing, drying after mixing, cooling to room temperature after drying, and crushing to obtain basic particles;
s4, preparing a plastic sheet:
putting the basic particles obtained in the step S3 into an extruder for extrusion molding, and performing water cooling after extrusion to obtain a blister sheet;
s5, plastic uptake forming:
and (4) heating the plastic-uptake sheet obtained in the step (S4) in a plastic-uptake machine, vacuumizing, softening the plastic-uptake sheet, adsorbing the plastic-uptake sheet to a mold by using pressure difference for plastic-uptake molding, obtaining a concave-convex sheet after the plastic-uptake molding, carrying out air cooling on the concave-convex sheet, carrying out hole carving on the concave-convex sheet by using a hole carving machine after the air cooling is finished, cutting after the hole carving is finished, and obtaining the concave-convex plastic-uptake net after the cutting is finished.
2. The preparation process of the novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the step S2 is that the mixing speed of a mixer is 100-120r/min, the mixing temperature is 70-80 ℃, and the mixing duration is 40-70min.
3. The preparation process of the novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the mixing speed in the step S3 is 80-100r/min, the mixing temperature is 90-100 ℃, and the mixing time is 1-2h.
4. The process for preparing the novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the drying temperature in the step S3 is 105-110 ℃, and the drying time is 1-2h.
5. The process for preparing a novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the extrusion temperature of the extruder in the step S4 is 130-150 ℃, the extrusion speed is 1-2m/min, and the extrusion pressure is 15-20MPa.
6. The process for preparing the novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein a mold on a plastic suction machine in the step S5 is coated with a release agent, and the release agent consists of the following components in parts by weight: 1-3 parts of alkyl sulfonate, 4-7 parts of alkylbenzene sulfonate, 2-5 parts of polyoxyethylene sorbitan fatty acid ester, 7-8 parts of acetyl triethyl citrate and 9-10 parts of sodium stearate.
7. The process for preparing a novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the air cooling temperature in the step S5 is 5-10 ℃, the air cooling wind speed is 2-3m/S, the number of the engraved holes of the engraving machine is 10-20, the engraving speed is 10-20 times/min, the heating temperature of the plastic suction machine is 150-240 ℃, and the working pressure of the plastic suction machine is 0.5-0.6MPa.
8. The process for preparing the novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the composite toughening agent is prepared from polypropylene carbonate, ethylene copolymer and poly (butylene adipate/terephthalate) copolymer in a mass ratio of 1:1:1, blending to obtain the product.
9. The preparation process of the novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the compatilizer is prepared from modified polyacrylate and amino-terminated polyurethane according to a mass ratio of 5:1, blending to obtain the product.
10. The preparation process of the novel high-open-pore 3D concave-convex plastic suction net according to claim 1, wherein the compatilizer is prepared from modified polyacrylate and amino-terminated polyurethane according to a mass ratio of 5:1, mixing and preparing.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015508A1 (en) * | 2014-07-31 | 2016-02-04 | 南京工业大学 | Straw biomass modification and method of use |
| CN112280185A (en) * | 2020-11-10 | 2021-01-29 | 常州汇恒膜科技有限公司 | Degradable plastic uptake sheet and preparation method thereof |
| CN113429803A (en) * | 2021-06-18 | 2021-09-24 | 晋江凯基高分子材料有限公司 | Plastic uptake box material for food and preparation method thereof |
| WO2022252266A1 (en) * | 2021-06-05 | 2022-12-08 | 贾帅 | Composite toughened and high-temperature-resistant polylactic acid modified material and preparation method therefor |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015508A1 (en) * | 2014-07-31 | 2016-02-04 | 南京工业大学 | Straw biomass modification and method of use |
| CN112280185A (en) * | 2020-11-10 | 2021-01-29 | 常州汇恒膜科技有限公司 | Degradable plastic uptake sheet and preparation method thereof |
| WO2022252266A1 (en) * | 2021-06-05 | 2022-12-08 | 贾帅 | Composite toughened and high-temperature-resistant polylactic acid modified material and preparation method therefor |
| CN113429803A (en) * | 2021-06-18 | 2021-09-24 | 晋江凯基高分子材料有限公司 | Plastic uptake box material for food and preparation method thereof |
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