CN112011076A - Packaging bag with rough surface and preparation method thereof - Google Patents

Packaging bag with rough surface and preparation method thereof Download PDF

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Publication number
CN112011076A
CN112011076A CN202010796807.6A CN202010796807A CN112011076A CN 112011076 A CN112011076 A CN 112011076A CN 202010796807 A CN202010796807 A CN 202010796807A CN 112011076 A CN112011076 A CN 112011076A
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titanium dioxide
layer
nano titanium
modified nano
composite
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CN112011076B (en
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谢伟峰
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Jiangmen Maaster Packaging Co ltd
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Jiangmen Maaster Packaging Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/34—Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Plant Pathology (AREA)
  • Wrappers (AREA)
  • Packages (AREA)

Abstract

The invention discloses a packaging bag with a rough surface, which is prepared from the following raw materials in parts by weight: 80-100 parts of plastic and 50-70 parts of composite coating; the plastic forms the packaging bag main body, the composite coating is coated on the outer layer of the packaging bag, and the composite coating is of a multilayer structure; the composite coating is a composite layer consisting of a bonding layer, a scratch-resistant layer, a waterproof layer and an attapulgite paste water-resistant putty composite layer from inside to outside, wherein the composite layer consists of matt oil, a coagulant and frosted particles; the attapulgite paste water-proof putty composite layer comprises modified nano titanium dioxide accounting for more than 30 percent of the total content of the attapulgite paste water-proof putty composite layer and oyster shell powder accounting for 10 percent of the total content of the attapulgite paste water-proof putty composite layer; the modified nano titanium dioxide can be surface modified nano titanium dioxide, silver ions accounting for 1.5-4.5% of the total weight of the surface modified nano titanium dioxide are added when the surface modified nano titanium dioxide is prepared, and a silane coupling agent or a titanate coupling agent is adopted. The invention has good material performance and bacteriostatic effect.

Description

Packaging bag with rough surface and preparation method thereof
Technical Field
The invention relates to the technical field of packaging bags, in particular to a packaging bag with a rough surface and a preparation method thereof.
Background
Plastic bags (Plastic bags) are bags made of plastics (commonly used plastics include polyethylene, polypropylene, polyester, nylon and the like) as main raw materials, are essential articles in daily life of people, and are often used for containing other articles. It is widely used because of its advantages of low cost, extremely light weight, large capacity, and easy storage. The annual output of plastics in China is 3000 ten thousand tons, and the consumption is over 600 ten thousand tons. The packaging bag is used for packaging bags of various articles, generally belongs to one type of plastic bags, enables goods to be conveniently transported and easily stored in a production flow process, and is widely applied to daily life and industrial production. The production raw materials are classified into high-pressure polyethylene plastic bags, low-pressure polyethylene plastic bags, polypropylene plastic bags, polyvinyl chloride plastic bags and the like. The bags are classified according to the shapes, namely a vest bag, a straight tube bag, a three-dimensional bag and a square bottom bag. Sealed bags, adhesive tape bags, shaped bags, etc. Plastic packaging bags are also used when packaging food.
Moisture barriers are typically placed inside plastic bags to prevent moisture from causing bacterial growth. However, in the prior art, because the packaging bag can not be exposed to a sterile environment during transportation and storage, bacteria growth on the surface of the packaging bag can occur, and when the packaging bag is opened, the outer layer of the packaging bag needs to be touched and then the food inside the packaging bag needs to be touched, so that the bacteria outside the packaging bag can be brought into the food. In addition, sometimes when the outer surface of the packaging bag needs to be torn, if oil or other liquid organic matters exist in the hands, the phenomenon of slipping the hands occurs, and the packaging bag is inconvenient to use. In addition, the packaging bag is aged for a long time, so that the material performance of the packaging bag is reduced.
Disclosure of Invention
The invention provides a packaging bag with a rough surface, solves the problems that bacteria on the surface of the packaging bag increase and the material performance is reduced due to aging after long storage time in the prior art, and achieves the effects of bacteriostasis and strong durability on the surface of the packaging bag.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the packaging bag with the rough surface is prepared from the following raw materials in parts by weight:
80-100 parts of plastic and 50-70 parts of composite coating;
the plastic forms the packaging bag main body, the composite coating is coated on the outer layer of the packaging bag, and the composite coating is of a multilayer structure; the composite coating comprises a PLA/TPU composite bonding layer, a scratch-resistant layer, a waterproof layer and an attapulgite paste waterproof putty composite layer or a composite layer consisting of matt oil, a coagulant and frosted particles from inside to outside;
the attapulgite paste water-proof putty composite layer comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; the modified nano titanium dioxide can be surface modified nano titanium dioxide; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 1.5-4.5% of the total weight of the surface modified nano titanium dioxide are added, and a silane coupling agent or a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide;
the raw materials of the matte oil comprise: 60% of quick-drying varnish, 8% of water-based wax emulsion, 10% of anti-friction agent, 2% of wetting agent, 15% of self-crosslinking acrylic emulsion and 5% of matting powder.
Preferably, the scratch-resistant layer can be a glass fiber bead layer; the waterproof layer may be a DPS waterproof coating.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 80-90 parts of plastic and 50-60 parts of composite coating.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 90-100 parts of plastic and 60-70 parts of composite coating.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 100 parts of plastic and 60 parts of composite coating; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 2 percent of the total weight of the surface modified nano titanium dioxide are added, and a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 90 parts of plastic and 60 parts of composite coating; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 4 percent of the total weight of the surface modified nano titanium dioxide are added, and a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 95 parts of plastic and 65 parts of composite coating; when the surface modified nano titanium dioxide is prepared, the chemical reaction condition is PH10, 78-82 ℃.
In another aspect, the present invention provides a method for preparing a packaging bag with a rough surface, comprising the following steps:
(S1) forming of the packaging bag main body: preparing a plastic part of the packaging bag by using conventional forming equipment to prepare a packaging bag main body;
(S2) preparing the surface modified nano titanium dioxide: taking inorganic salt of titanium as a titanium raw material of titanium dioxide, hydrolyzing and polycondensing to obtain a primary solution, adding silver ions and a silane coupling agent or a titanate coupling agent into the primary solution, and continuously mixing to obtain a modified nano titanium dioxide mixed solution;
(S3) preparing an attapulgite paste water proof putty composite layer: further mixing the calcium carbonate, the sierozem powder, the organic glue powder, the water-retaining agent and the oyster shell powder with the modified nano titanium dioxide mixed solution prepared in the step (S2) to prepare attapulgite paste water-resistant putty composite layer mixed solution;
(S4) coating a PLA/TPU composite adhesive layer: coating the liquid PLA/TPU composite liquid on the surface of the packaging bag main body until a semi-dry semi-liquid PLA/TPU composite adhesive layer is formed;
(S5) coating of scratch-resistant layer: coating a liquid scratch-resistant layer solution on the semi-dried semi-liquid PLA/TPU composite adhesive layer in (S4) and drying the same;
(S6) waterproof layer coating: coating a liquid water repellent layer solution on the scratch-resistant layer in (S5), and drying it;
(S7) coating the attapulgite paste water proof putty composite layer: and (4) coating the mixed liquid of the attapulgite paste water-proof putty composite layer prepared in the step (S3) on the waterproof layer in the step (S6), and drying to obtain the packaging bag with the rough surface, wherein the surface of the packaging bag is the attapulgite paste water-proof putty composite layer.
The technical scheme of the invention at least has the following advantages or beneficial effects:
the attapulgite paste waterproof putty composite layer in the composite coating adopted by the packaging bag comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; wherein, the modified nano titanium dioxide can be surface modified nano titanium dioxide; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 1.5-4.5% of the total weight of the surface modified nano titanium dioxide are added, and a series of technical means such as a silane coupling agent or a titanate coupling agent are adopted; specifically, when the silane coupling agent is used, the hydrolyzed silane coupling agent can be coated on the surface of the nano titanium dioxide, so that the dispersibility of the nano titanium dioxide is improved, the agglomeration phenomenon is reduced, and the adsorbability is improved; the use of titanate coupling agents reduces the surface energy and the number of surface hydroxyl groups, resulting in a reduction of inter-particle hydrogen bonding interactions. No matter the silane coupling agent or the titanate coupling agent is used, the agglomeration phenomenon among particles can be reduced, the material performance of the surface of the coating is average and porous, and the surface of the packaging bag can prevent bacteria from rapidly growing by combining the antibacterial characteristic of silver ions. In addition, the oyster shell powder has the characteristic of hardening by absorbing water and is combined with the scratch-resistant layer and the waterproof layer, so that the material strength of the packaging bag is improved in a plurality of ways. When bacteria contact the surface of the packaging bag, the porosity of the modified titanium dioxide is helpful for adsorbing the bacteria, and the silver ions in the packaging bag can inhibit the growth of the adsorbed bacteria. The technical problems that bacteria on the surface of a packaging bag are increased and the material performance is reduced due to aging after long storage time in the prior art are solved, and the technical effects of antibiosis and durability enhancement are achieved.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The technical scheme of the invention provides a packaging bag with a rough surface and a preparation method thereof, and the attapulgite paste waterproof putty composite layer and the scratch-resistant layer in the composite coating are combined with the waterproof layer and silver ions. Wherein, the attapulgite paste water proof putty composite layer comprises 30 percent of modified nanometer titanium dioxide and 10 percent of oyster shell powder. The technical problems that bacteria on the surface of a packaging bag are increased and the material performance is reduced due to aging after long storage time in the prior art are solved, and the technical effects of antibiosis and durability enhancement are achieved.
The specific idea for solving the technical problems is as follows:
the packaging bag with the rough surface is prepared from the following raw materials in parts by weight:
80-100 parts of plastic and 50-70 parts of composite coating;
the plastic forms a packaging bag main body, the composite coating is coated on the outer layer of the packaging bag, and the composite coating is of a multilayer structure; the composite coating comprises a PLA/TPU composite bonding layer, a scratch-resistant layer, a waterproof layer and an attapulgite paste waterproof putty composite layer from inside to outside;
the attapulgite paste water-proof putty composite layer comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; the modified nano titanium dioxide can be surface modified nano titanium dioxide; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 1.5-4.5% of the total weight of the surface modified nano titanium dioxide are added, and a silane coupling agent or a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments.
Example 1
The packaging bag with the rough surface is prepared from the following raw materials in parts by weight:
80 parts of plastic and 50 parts of composite coating;
the plastic forms a packaging bag main body, the composite coating is coated on the outer layer of the packaging bag, and the composite coating is of a multilayer structure; the composite coating comprises a PLA/TPU composite bonding layer, a scratch-resistant layer, a waterproof layer and an attapulgite paste waterproof putty composite layer from inside to outside;
the attapulgite paste water-proof putty composite layer comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; the modified nano titanium dioxide can be surface modified nano titanium dioxide; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 1.5 percent of the total weight of the surface modified nano titanium dioxide are added, and a silane coupling agent or a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
Specifically, the scratch-resistant layer can be a glass fiber bead layer; the waterproof layer can be DPS waterproof paint.
Specifically, when the surface modified nano titanium dioxide is prepared, the chemical reaction conditions are PH10 and 78 ℃.
The embodiment also provides a preparation method of the packaging bag with the rough surface, which comprises the following steps:
(S1) forming of the packaging bag main body: preparing a plastic part of the packaging bag by using conventional forming equipment to prepare a packaging bag main body;
(S2) preparing the surface modified nano titanium dioxide: taking inorganic salt of titanium as a titanium raw material of titanium dioxide, hydrolyzing and polycondensing to obtain a primary solution, adding silver ions and a silane coupling agent or a titanate coupling agent into the primary solution, and continuously mixing to obtain a modified nano titanium dioxide mixed solution;
(S3) preparing an attapulgite paste water proof putty composite layer: further mixing the calcium carbonate, the sierozem powder, the organic glue powder, the water-retaining agent and the oyster shell powder with the modified nano titanium dioxide mixed solution prepared in the step (S2) to prepare attapulgite paste water-resistant putty composite layer mixed solution;
(S4) coating a PLA/TPU composite adhesive layer: coating the liquid PLA/TPU composite liquid on the surface of the packaging bag main body until a semi-dry semi-liquid PLA/TPU composite adhesive layer is formed;
(S5) coating of scratch-resistant layer: coating a liquid scratch-resistant layer solution on the semi-dried semi-liquid PLA/TPU composite adhesive layer in (S4) and drying the same;
(S6) waterproof layer coating: coating a liquid water repellent layer solution on the scratch-resistant layer in (S5), and drying it;
(S7) coating the attapulgite paste water proof putty composite layer: and (4) coating the mixed liquid of the attapulgite paste water-proof putty composite layer prepared in the step (S3) on the waterproof layer in the step (S6), and drying to obtain the packaging bag with the rough surface, wherein the surface of the packaging bag is the attapulgite paste water-proof putty composite layer.
The technical scheme of the embodiment at least has the following advantages or beneficial effects:
the attapulgite paste waterproof putty composite layer in the composite coating adopted by the packaging bag comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; wherein, the modified nano titanium dioxide can be surface modified nano titanium dioxide; when preparing the surface modified nano titanium dioxide, silver ions accounting for 1.5 percent of the total weight of the surface modified nano titanium dioxide are added, and a series of technical means such as a silane coupling agent or a titanate coupling agent are adopted; specifically, when the silane coupling agent is used, the hydrolyzed silane coupling agent can be coated on the surface of the nano titanium dioxide, so that the dispersibility of the nano titanium dioxide is improved, the agglomeration phenomenon is reduced, and the adsorbability is improved; the use of titanate coupling agents reduces the surface energy and the number of surface hydroxyl groups, resulting in a reduction of inter-particle hydrogen bonding interactions. No matter the silane coupling agent or the titanate coupling agent is used, the agglomeration phenomenon among particles can be reduced, the material performance of the surface of the coating is average and porous, and the surface of the packaging bag can prevent bacteria from rapidly growing by combining the antibacterial characteristic of silver ions. In addition, the oyster shell powder has the characteristic of hardening by absorbing water and is combined with the scratch-resistant layer and the waterproof layer, so that the material strength of the packaging bag is improved in a plurality of ways. When bacteria contact the surface of the packaging bag, the porosity of the modified titanium dioxide is helpful for adsorbing the bacteria, and the silver ions in the packaging bag can inhibit the growth of the adsorbed bacteria. The technical problems that bacteria on the surface of a packaging bag are increased and the material performance is reduced due to aging after long storage time in the prior art are solved, and the technical effects of antibiosis and durability enhancement are achieved.
Example 2
The packaging bag with the rough surface is prepared from the following raw materials in parts by weight:
90 parts of plastic and 60 parts of composite coating;
the plastic forms a packaging bag main body, the composite coating is coated on the outer layer of the packaging bag, and the composite coating is of a multilayer structure; the composite coating comprises a PLA/TPU composite bonding layer, a scratch-resistant layer, a waterproof layer and an attapulgite paste waterproof putty composite layer from inside to outside;
the attapulgite paste water-proof putty composite layer comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; the modified nano titanium dioxide can be surface modified nano titanium dioxide; when the surface modified nano titanium dioxide is prepared, silver ions which account for 3 percent of the total weight of the surface modified nano titanium dioxide are added, and a silane coupling agent or a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
Specifically, the scratch-resistant layer can be a glass fiber bead layer; the waterproof layer can be DPS waterproof paint.
More specifically, when the surface modified nano titanium dioxide is prepared, the chemical reaction condition is PH10, 80 ℃.
In another aspect, the present invention provides a method for manufacturing a packaging bag with a rough surface, including the following steps:
(S1) forming of the packaging bag main body: preparing a plastic part of the packaging bag by using conventional forming equipment to prepare a packaging bag main body;
(S2) preparing the surface modified nano titanium dioxide: taking inorganic salt of titanium as a titanium raw material of titanium dioxide, hydrolyzing and polycondensing to obtain a primary solution, adding silver ions and a silane coupling agent or a titanate coupling agent into the primary solution, and continuously mixing to obtain a modified nano titanium dioxide mixed solution;
(S3) preparing an attapulgite paste water proof putty composite layer: further mixing the calcium carbonate, the sierozem powder, the organic glue powder, the water-retaining agent and the oyster shell powder with the modified nano titanium dioxide mixed solution prepared in the step (S2) to prepare attapulgite paste water-resistant putty composite layer mixed solution;
(S4) coating a PLA/TPU composite adhesive layer: coating the liquid PLA/TPU composite liquid on the surface of the packaging bag main body until a semi-dry semi-liquid PLA/TPU composite adhesive layer is formed;
(S5) coating of scratch-resistant layer: coating a liquid scratch-resistant layer solution on the semi-dried semi-liquid PLA/TPU composite adhesive layer in (S4) and drying the same;
(S6) waterproof layer coating: coating a liquid water repellent layer solution on the scratch-resistant layer in (S5), and drying it;
(S7) coating the attapulgite paste water proof putty composite layer: and (4) coating the mixed liquid of the attapulgite paste water-proof putty composite layer prepared in the step (S3) on the waterproof layer in the step (S6), and drying to obtain the packaging bag with the rough surface, wherein the surface of the packaging bag is the attapulgite paste water-proof putty composite layer.
The technical scheme of the embodiment at least has the following advantages or beneficial effects:
the attapulgite paste waterproof putty composite layer in the composite coating adopted by the packaging bag comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; wherein, the modified nano titanium dioxide can be surface modified nano titanium dioxide; when preparing the surface modified nano titanium dioxide, adding silver ions which account for 3 percent of the total weight of the surface modified nano titanium dioxide, and adopting a series of technical means such as a silane coupling agent or a titanate coupling agent and the like; specifically, when the silane coupling agent is used, the hydrolyzed silane coupling agent can be coated on the surface of the nano titanium dioxide, so that the dispersibility of the nano titanium dioxide is improved, the agglomeration phenomenon is reduced, and the adsorbability is improved; the use of titanate coupling agents reduces the surface energy and the number of surface hydroxyl groups, resulting in a reduction of inter-particle hydrogen bonding interactions. No matter the silane coupling agent or the titanate coupling agent is used, the agglomeration phenomenon among particles can be reduced, the material performance of the surface of the coating is average and porous, and the surface of the packaging bag can prevent bacteria from rapidly growing by combining the antibacterial characteristic of silver ions. In addition, the oyster shell powder has the characteristic of hardening by absorbing water and is combined with the scratch-resistant layer and the waterproof layer, so that the material strength of the packaging bag is improved in a plurality of ways. When bacteria contact the surface of the packaging bag, the porosity of the modified titanium dioxide is helpful for adsorbing the bacteria, and the silver ions in the packaging bag can inhibit the growth of the adsorbed bacteria. The technical problems that bacteria on the surface of a packaging bag are increased and the material performance is reduced due to aging after the packaging bag is stored for a long time in the prior art are solved, the antibacterial performance can be improved due to the increase of silver ions, and the technical effects of antibiosis and durability enhancement are further achieved.
Example 3
The packaging bag with the rough surface is prepared from the following raw materials in parts by weight:
100 parts of plastic and 70 parts of composite coating;
the plastic forms a packaging bag main body, the composite coating is coated on the outer layer of the packaging bag, and the composite coating is of a multilayer structure; the composite coating comprises a PLA/TPU composite bonding layer, a scratch-resistant layer, a waterproof layer and an attapulgite paste waterproof putty composite layer from inside to outside;
the attapulgite paste water-proof putty composite layer comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; the modified nano titanium dioxide can be surface modified nano titanium dioxide; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 4.5 percent of the total weight of the surface modified nano titanium dioxide are added, and a silane coupling agent or a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
Specifically, the scratch-resistant layer can be a glass fiber bead layer; the waterproof layer can be DPS waterproof paint.
The feed is prepared from the following raw materials in parts by weight: 90 parts of plastic and 60 parts of composite coating; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 4 percent of the total weight of the surface modified nano titanium dioxide are added, and a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
More specifically, when the surface modified nano titanium dioxide is prepared, the chemical reaction condition is PH10, 82 ℃.
The embodiment also provides a preparation method of the packaging bag with the rough surface, which comprises the following steps:
(S1) forming of the packaging bag main body: preparing a plastic part of the packaging bag by using conventional forming equipment to prepare a packaging bag main body;
(S2) preparing the surface modified nano titanium dioxide: taking inorganic salt of titanium as a titanium raw material of titanium dioxide, hydrolyzing and polycondensing to obtain a primary solution, adding silver ions and a silane coupling agent or a titanate coupling agent into the primary solution, and continuously mixing to obtain a modified nano titanium dioxide mixed solution;
(S3) preparing an attapulgite paste water proof putty composite layer: further mixing the calcium carbonate, the sierozem powder, the organic glue powder, the water-retaining agent and the oyster shell powder with the modified nano titanium dioxide mixed solution prepared in the step (S2) to prepare attapulgite paste water-resistant putty composite layer mixed solution;
(S4) coating a PLA/TPU composite adhesive layer: coating the liquid PLA/TPU composite liquid on the surface of the packaging bag main body until a semi-dry semi-liquid PLA/TPU composite adhesive layer is formed;
(S5) coating of scratch-resistant layer: coating a liquid scratch-resistant layer solution on the semi-dried semi-liquid PLA/TPU composite adhesive layer in (S4) and drying the same;
(S6) waterproof layer coating: coating a liquid water repellent layer solution on the scratch-resistant layer in (S5), and drying it;
(S7) coating the attapulgite paste water proof putty composite layer: and (4) coating the mixed liquid of the attapulgite paste water-proof putty composite layer prepared in the step (S3) on the waterproof layer in the step (S6), and drying to obtain the packaging bag with the rough surface, wherein the surface of the packaging bag is the attapulgite paste water-proof putty composite layer.
The technical scheme of the embodiment at least has the following advantages or beneficial effects:
the attapulgite paste waterproof putty composite layer in the composite coating adopted by the packaging bag comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; wherein, the modified nano titanium dioxide can be surface modified nano titanium dioxide; when preparing the surface modified nano titanium dioxide, silver ions accounting for 4.5 percent of the total weight of the surface modified nano titanium dioxide are added, and a series of technical means such as a silane coupling agent or a titanate coupling agent are adopted; specifically, when the silane coupling agent is used, the hydrolyzed silane coupling agent can be coated on the surface of the nano titanium dioxide, so that the dispersibility of the nano titanium dioxide is improved, the agglomeration phenomenon is reduced, and the adsorbability is improved; the use of titanate coupling agents reduces the surface energy and the number of surface hydroxyl groups, resulting in a reduction of inter-particle hydrogen bonding interactions. No matter the silane coupling agent or the titanate coupling agent is used, the agglomeration phenomenon among particles can be reduced, the material performance of the surface of the coating is average and porous, and the surface of the packaging bag can prevent bacteria from rapidly growing by combining the antibacterial characteristic of silver ions. In addition, the oyster shell powder has the characteristic of hardening by absorbing water and is combined with the scratch-resistant layer and the waterproof layer, so that the material strength of the packaging bag is improved in a plurality of ways. When bacteria contact the surface of the packaging bag, the porosity of the modified titanium dioxide is helpful for adsorbing the bacteria, and the silver ions in the packaging bag can inhibit the growth of the adsorbed bacteria. The technical problems that bacteria on the surface of a packaging bag are increased and the material performance is reduced due to aging after the packaging bag is stored for a long time in the prior art are solved, the antibacterial performance can be improved due to the increase of silver ions, and the technical effects of antibiosis and durability enhancement are further achieved.
The wear resistance test of the embodiment of the invention is shown in table one:
table one: abrasion resistance test of examples and comparative examples
Figure BDA0002625938010000071
The inventive examples and comparative examples were tested according to QB/T2591-2003, antimicrobial plastic-antimicrobial property test method and antimicrobial effect, and the results are shown in Table II:
table two: examples and comparative examples antibacterial test
Figure BDA0002625938010000072
Figure BDA0002625938010000081
As is clear from the results of table one and table two, the examples of the present invention are superior to the comparative examples in both durability and antibacterial property.
The outermost layer of the composite coating provided by the embodiment of the invention can be a composite layer consisting of matte oil, a coagulant and frosted particles.
In addition, the embodiment of the invention can also be made into a packaging bag with a rough surface, wherein the packaging bag is prepared by combining a packaging bag main body consisting of plastics and a composite layer consisting of matt oil, a coagulant and frosted particles.
Wherein, the raw materials of the outermost matte oil of the composite bed of the packing bag include: 60% of quick-drying varnish, 8% of water-based wax emulsion, 10% of anti-friction agent, 2% of wetting agent, 15% of self-crosslinking acrylic emulsion and 5% of matting powder. Wherein the self-crosslinking acrylic emulsion is water-based acrylic emulsion with a self-crosslinking functional group, the Tg value is 9.8 ℃, and the solid content is 43 percent.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims (8)

1. A surface roughness's wrapping bag which characterized in that: the material is prepared from the following raw materials in parts by weight:
80-100 parts of plastic and 50-70 parts of composite coating;
the plastic forms the packaging bag main body, the composite coating is coated on the outer layer of the packaging bag, and the composite coating is of a multilayer structure; the composite coating comprises a PLA/TPU composite bonding layer, a scratch-resistant layer, a waterproof layer and an attapulgite paste waterproof putty composite layer or a composite layer consisting of matt oil, a coagulant and frosted particles from inside to outside;
the attapulgite paste water-proof putty composite layer comprises 30 percent of modified nano titanium dioxide and 10 percent of oyster shell powder; the modified nano titanium dioxide can be surface modified nano titanium dioxide; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 1.5-4.5% of the total weight of the surface modified nano titanium dioxide are added, and a silane coupling agent or a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide;
the raw materials of the matte oil comprise: 60% of quick-drying varnish, 8% of water-based wax emulsion, 10% of anti-friction agent, 2% of wetting agent, 15% of self-crosslinking acrylic emulsion and 5% of matting powder.
2. The rough-surface packing bag according to claim 1, wherein: the scratch-resistant layer can be a glass fiber bead layer; the waterproof layer may be a DPS waterproof coating.
3. The rough-surface packing bag according to claim 2, wherein: the material is prepared from the following raw materials in parts by weight: 80-90 parts of plastic and 50-60 parts of composite coating.
4. The rough-surface packing bag according to claim 2, wherein: the material is prepared from the following raw materials in parts by weight: 90-100 parts of plastic and 60-70 parts of composite coating.
5. The rough-surface packing bag according to claim 2, wherein: the material is prepared from the following raw materials in parts by weight: 100 parts of plastic and 60 parts of composite coating; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 2 percent of the total weight of the surface modified nano titanium dioxide are added, and a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
6. The rough-surface packing bag according to claim 2, wherein: the material is prepared from the following raw materials in parts by weight: 90 parts of plastic and 60 parts of composite coating; when the surface modified nano titanium dioxide is prepared, silver ions accounting for 4 percent of the total weight of the surface modified nano titanium dioxide are added, and a titanate coupling agent is adopted to reduce the agglomeration phenomenon of the surface modified nano titanium dioxide.
7. The rough-surface packing bag according to claim 2, wherein: the material is prepared from the following raw materials in parts by weight: 95 parts of plastic and 65 parts of composite coating; when the surface modified nano titanium dioxide is prepared, the chemical reaction condition is PH10, 78-82 ℃.
8. The method for preparing a packaging bag having a rough surface according to any one of claims 1 to 7, wherein: the method comprises the following steps:
(S1) forming of the packaging bag main body: preparing a plastic part of the packaging bag by using conventional forming equipment to prepare a packaging bag main body;
(S2) preparing the surface modified nano titanium dioxide: taking inorganic salt of titanium as a titanium raw material of titanium dioxide, hydrolyzing and polycondensing to obtain a primary solution, adding silver ions and a silane coupling agent or a titanate coupling agent into the primary solution, and continuously mixing to obtain a modified nano titanium dioxide mixed solution;
(S3) preparing an attapulgite paste water proof putty composite layer: further mixing the calcium carbonate, the sierozem powder, the organic glue powder, the water-retaining agent and the oyster shell powder with the modified nano titanium dioxide mixed solution prepared in the step (S2) to prepare attapulgite paste water-resistant putty composite layer mixed solution;
(S4) coating a PLA/TPU composite adhesive layer: coating the liquid PLA/TPU composite liquid on the surface of the packaging bag main body until a semi-dry semi-liquid PLA/TPU composite adhesive layer is formed;
(S5) coating of scratch-resistant layer: coating a liquid scratch-resistant layer solution on the semi-dried semi-liquid PLA/TPU composite adhesive layer in (S4) and drying the same;
(S6) waterproof layer coating: coating a liquid water repellent layer solution on the scratch-resistant layer in (S5), and drying it;
(S7) coating the attapulgite paste water proof putty composite layer or: and (4) coating the mixed liquid of the attapulgite paste water-proof putty composite layer prepared in the step (S3) on the waterproof layer in the step (S6), and drying to obtain the packaging bag with the rough surface, wherein the surface of the packaging bag is the attapulgite paste water-proof putty composite layer.
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CN108129971A (en) * 2017-12-27 2018-06-08 中山大学 A kind of anti-scraping coating of environmental protection resistance and fingerprint resistance and its application method
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CN110564279A (en) * 2019-08-12 2019-12-13 顺缔高新材料江苏有限公司 ocean engineering anticorrosive polyurea coating and preparation method thereof
CN210213289U (en) * 2019-06-10 2020-03-31 浙江宇义包装有限公司 Putty powder packaging bag with good sealing effect
CN111363436A (en) * 2020-04-29 2020-07-03 广东法兰迪涂料有限公司 Water-based multicolor paint and preparation method thereof

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* Cited by examiner, † Cited by third party
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JPH08253246A (en) * 1995-03-20 1996-10-01 Sumitomo Chem Co Ltd Packing bag excellent in oil resistance and boiling resistance
CN102702826A (en) * 2012-06-12 2012-10-03 天长市巨龙车船涂料有限公司 Antibacterial negative ion putty powder
CN105440779A (en) * 2015-12-30 2016-03-30 茂名阪田油墨有限公司 Friction-resistant matt varnish and preparation method thereof
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CN108129971A (en) * 2017-12-27 2018-06-08 中山大学 A kind of anti-scraping coating of environmental protection resistance and fingerprint resistance and its application method
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