WO2020034959A1 - 一种耐磨塑料包装袋及其加工工艺 - Google Patents

一种耐磨塑料包装袋及其加工工艺 Download PDF

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Publication number
WO2020034959A1
WO2020034959A1 PCT/CN2019/100424 CN2019100424W WO2020034959A1 WO 2020034959 A1 WO2020034959 A1 WO 2020034959A1 CN 2019100424 W CN2019100424 W CN 2019100424W WO 2020034959 A1 WO2020034959 A1 WO 2020034959A1
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Prior art keywords
resistant
wear
abrasion
packaging bag
plastic packaging
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PCT/CN2019/100424
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English (en)
French (fr)
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田雨生
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田雨生
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5808—Measuring, controlling or regulating pressure or compressing force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5816—Measuring, controlling or regulating temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Definitions

  • the invention belongs to the technical field of plastic packaging bag processing, and in particular relates to a wear-resistant plastic packaging bag and a processing technology thereof.
  • Plastic shopping bags are a necessity in daily life. As we all know, consumers and shopping malls have formed a rigid demand for plastic packaging bags, and this consumption has become a habit. Plastic packaging bags have been integrated into everyone's life. In daily life, plastic packaging bags are becoming the first choice for packaging products due to their light weight and convenient use. In developing countries, the number of malls has steadily increased due to the commercialization process, which has led to the further prosperity of the plastic packaging bag industry. The two are highly correlated. The global plastic packaging bag industry has shown a steadily increasing development trend, especially in developing countries, the total demand for plastic packaging bags still shows a rapid growth momentum, thereby promoting the continuous growth and prosperity of the plastic packaging bag industry.
  • plastic bags are relatively simple in material and structure, and are easy to be damaged during use, and because they are made of a variety of additive ingredients, they cannot store food, avoid affecting human health, and are quite inconvenient to use.
  • the purpose of the present invention is to provide a wear-resistant plastic packaging bag and its processing technology to solve the following technical problems in the prior art: (1) the existing plastic bag has a simple material and structure and is easily damaged during use: (2) plastic The material of the packaging bag is not healthy enough and environmentally friendly to store food.
  • An abrasion-resistant plastic packaging bag includes an inner environmentally friendly substrate layer, a middle interlayer, and an outer abrasion-resistant layer.
  • the surface of the abrasion-resistant layer is evenly distributed with abrasion-resistant protrusions.
  • the grinding protrusions are all made of a special wear-resistant material, and the wear-resistant layer is formed integrally with the wear-resistant protrusions;
  • the wear-resistant plastic packaging bag is processed by the following steps:
  • Step S1 Preparation of environmentally friendly substrate layer: Put polylactic acid into a film blowing machine, adjust the temperature of the film blowing machine to 200-220 ° C, and blow mold to form an environmentally friendly substrate layer;
  • Step S2 Preparation of abrasion-resistant layer and abrasion-resistant protrusions: Mix the modified silicone resin, hydroxy silicone oil, sol, boehmite, and tetraethylammonium benzoate according to the mixing ratio, place in the mold, and place the mold in the mold.
  • the film is laminated between the flat hydraulic presses. The temperature of the film is 45 ° C, the constant pressure is 0.6MPa, and the pressure is maintained for 45-50s. Take out and cool at room temperature and pressure to obtain an integrated wear-resistant layer and wear-resistant protrusions.
  • Step S3 Mix the nano titanium dioxide and the acrylate adhesive according to a mass ratio of 1: 0.8-1, put them in a spray gun, spray uniformly on the smooth side surface of the wear-resistant layer, and then cover the environmental protection substrate layer.
  • the laminated body is placed in a flat hydraulic press, the pressing temperature is 48 ° C, the pressure is 0.4 MPa, and the pressure is maintained for 55-60s to obtain a plastic film;
  • Step S4 The plastic film is placed on the feeding device of the bag making machine, and the plastic film is cut. After the cutting, the bottom and both sides of the bag body are heat-sealed and edge-sealed separately, and the edge-sealed bag body is die-molded. The punching process punches out the lifting hole on the bag body handle to obtain a wear-resistant plastic packaging bag.
  • the environmentally friendly substrate layer is made of polylactic acid, and the thickness of the environmentally friendly substrate layer is 0.15-0.25 mm.
  • the interlayer is made of nano titanium dioxide, and the thickness of the interlayer is 0.3-0.5mm.
  • the thickness of the wear-resistant layer is 0.3-0.4 mm.
  • the wear-resistant protrusion is in the shape of a hemisphere, the arc surface of the hemisphere faces outward, and the diameter of the hemisphere is 0.05-0.07mm.
  • the special wear-resistant material is made of the following main parts by weight: 50-60 parts of modified silicone resin, 6-9 parts of hydroxy silicone oil, 15-20 parts of sol, and 3-5 of boehmite Parts, 1-1.5 parts of tetraethylammonium benzoate.
  • the modified silicone resin is prepared by the following steps: 1) dimethyldimethoxysilane, ethyl orthosilicate and glacial acetic acid are added to a three-necked flask, placed in a water bath, and heated with stirring To 57-59 ° C, add methyl methacrylate dropwise using a constant pressure dropping funnel, constant temperature reaction for 100-110min; then raise the temperature to 93-95 ° C, stir for 6.5-7.5h, stop heating, and cool to 35-38 ° C. Then slowly heated to 120 ° C. for distillation under reduced pressure to obtain a first product;
  • the ratio of the amount of dimethyldimethoxysilane, ethyl orthosilicate, glacial acetic acid, and methyl methacrylate is 1: 1: 0.3-0.4: 1.5-1.8;
  • the ratio of the amounts of phenyltrimethoxysilane, ⁇ -methacryloxypropyltrimethoxysilane, and the substance of the first product is 1: 1: 0.5-0.6.
  • the sol is prepared by the following method: aluminum nitrate is added to ethanol to be fully stirred to prepare a solution, and after being uniformly stirred, ethanolamine is slowly added dropwise to the above solution and stirred for 65-70 min, and the mixed solution is placed in Stir in a constant temperature water bath at 60 °C for 80-90min to obtain a sol;
  • the ratio of the amounts of the substances of aluminum trichloride, ethanol, and triethanolamine is 1: 10-12: 2-2.5.
  • a processing technology of a wear-resistant plastic packaging bag includes the following steps:
  • Step S1 Preparation of environmentally friendly substrate layer: Put polylactic acid into a film blowing machine, adjust the temperature of the film blowing machine to 200-220 ° C, and blow mold to form an environmentally friendly substrate layer;
  • Step S2 Preparation of abrasion-resistant layer and abrasion-resistant protrusions: Mix the modified silicone resin, hydroxy silicone oil, sol, boehmite, and tetraethylammonium benzoate according to the mixing ratio, place in the mold, and place the mold in the mold.
  • the film is laminated between the flat hydraulic presses. The temperature of the film is 45 ° C, the constant pressure is 0.6MPa, and the pressure is maintained for 45-50s. Take out and cool at room temperature and pressure to obtain an integrated wear-resistant layer and wear-resistant protrusions.
  • Step S3 Mix the nano titanium dioxide and the acrylate adhesive according to a mass ratio of 1: 0.8-1, put them in a spray gun, spray uniformly on the smooth side surface of the wear-resistant layer, and then cover the environmental protection substrate layer.
  • the laminated body is placed in a flat hydraulic press, the pressing temperature is 48 ° C, the pressure is 0.4 MPa, and the pressure is maintained for 55-60s to obtain a plastic film;
  • Step S4 The plastic film is placed on the feeding device of the bag making machine, and the plastic film is cut. After the cutting, the bottom and both sides of the bag body are heat-sealed and edge-sealed separately, and the edge-sealed bag body is die-molded. The punching process punches out the lifting hole on the bag body handle to obtain a wear-resistant plastic packaging bag.
  • the wear-resistant layer of the plastic packaging bag of the present invention uses a special wear-resistant material.
  • the wear-resistant material uses modified silicone resin as the base material.
  • the methacrylate group and the silicone polymer can form a stable CO- Si bond, no bond hydrolysis failure, can achieve the expected modification effect, so that the modified silicone resin has both the composite properties of organic and inorganic materials; at the same time, the modified silicone resin has O-Si-O network
  • the structure as the skeleton, as the main body of the film can improve the denseness of the film layer, the content of trifunctional chain is high, the crosslink density is high, and the network crosslinked copolymer is formed, which makes the film layer harder, thereby improving the abrasion resistance of the film layer
  • the ethanolamine aluminum sol is incorporated into the wear-resistant material layer, under heating conditions, it will decompose to produce aluminum oxide, and the aluminum oxide is evenly dispersed in the wear-resistant material, which can fill the gap between the silicone resins.
  • the abrasion resistance made of the abrasion-resistant material is strong, and as the outermost layer of the plastic packaging bag, the abrasion resistance of the plastic packaging bag can be improved;
  • the surface of the outer wear-resistant layer of the plastic bag of the present invention is provided with wear-resistant protrusions of the same wear-resistant material.
  • the wear-resistant protrusions are evenly distributed, which can disperse the stress applied to the surface of the plastic bag and improve the plastic packaging bag. Strength of;
  • the plastic packaging bag of the present invention includes an inner environmental protection substrate layer, an intermediate interlayer, and an outer wear layer.
  • the environmental protection substrate layer is made of polylactic acid, and the production process of polylactic acid is pollution-free, and the product can be biologically Degradation, non-toxic to the human body, non-toxic and environmentally friendly, can store food; interlayer uses nano titanium dioxide, nano titanium dioxide has anti-ultraviolet, antibacterial, self-cleaning, anti-aging effects; the outer wear layer has excellent wear resistance, Can improve the service life of plastic packaging bags, and low production costs.
  • FIG. 1 is a schematic structural diagram of a wear-resistant plastic packaging bag according to the present invention
  • FIG. 2 is a schematic structural diagram of a mold used in a processing process of a wear-resistant plastic packaging bag according to the present invention.
  • a wear-resistant plastic packaging bag as shown in FIG. 1, includes an inner environmentally friendly substrate layer 1, an intermediate interlayer 2, and an outer wear-resistant layer 3.
  • the surface of the wear-resistant layer 3 is evenly coated with abrasion resistance.
  • the protrusion 4, the wear-resistant layer 3 and the wear-resistant protrusion 4 are all made of a special wear-resistant material, and the wear-resistant layer 3 and the wear-resistant protrusion 4 are integrally formed;
  • the environmental protection substrate layer 1 is made of polylactic acid, and the thickness of the environmental protection substrate layer 1 is 0.15-0.25mm;
  • Interlayer 2 uses nano titanium dioxide, and the thickness of interlayer 2 is 0.3-0.5mm;
  • the thickness of the wear-resistant layer 3 is 0.3-0.4mm
  • the wear-resistant protrusion 4 is in the shape of a hemisphere, the arc surface of the hemisphere faces outward, and the diameter of the hemisphere is 0.05-0.07mm;
  • the special wear-resistant material is made of the following main parts by weight: 50-60 parts of modified silicone resin, 6-9 parts of hydroxy silicone oil, 15-20 parts of sol, 3-5 parts of boehmite, benzene 1-1.5 parts of tetraethylammonium formate;
  • the modified silicone resin is prepared by the following steps: (1) Add dimethyldimethoxysilane, ethyl orthosilicate and glacial acetic acid to a three-necked flask, place it in a water bath, and stir to warm to 57-59 °C, add methyl methacrylate dropwise using a constant pressure dropping funnel, constant temperature reaction for 100-110min; then raise the temperature to 93-95 °C, stir for 6.5-7.5h, stop heating, cool to 35-38 °C, and then slowly heat to Distilled under reduced pressure at 120 ° C to obtain the first product;
  • the ratio of the amount of dimethyldimethoxysilane, ethyl orthosilicate, glacial acetic acid, and methyl methacrylate is 1: 1: 0.3-0.4: 1.5-1.8;
  • the ratio of the amounts of phenyltrimethoxysilane, ⁇ -methacryloxypropyltrimethoxysilane, and the substance of the first product is 1: 1: 0.5-0.6;
  • the methacrylate group and the silicone polymer can form a stable CO-Si bond without the occurrence of bond hydrolysis failure, and can achieve the expected modification effect, so that the modified silicone resin has a combination of organic and inorganic materials. Performance;
  • the modified silicone resin has an O-Si-O network structure as a skeleton, as the film main body can improve the denseness of the film layer, a higher content of trifunctional links, a large crosslink density, and form a network crosslink Copolymer, which makes the film layer harder, thereby improving the abrasion resistance of the film layer;
  • the ratio of the amount of aluminum trichloride, ethanol, and triethanolamine is 1: 10-12: 2-2.5;
  • Aluminum nitrate can undergo alcoholysis in ethanol solution. At the same time, due to the presence of water, there is also a hydrolysis reaction in the solution. The generated Al (OC 2 H 5 ) 3 and Al (OH) 3 react with ethanolamine to produce an ethanolamine aluminum sol. ; When ethanolamine aluminum sol is incorporated into the wear-resistant material layer, under heating conditions, it will decompose to produce aluminum oxide, and the aluminum oxide is evenly dispersed in the wear-resistant material, which can fill the gap between the silicone resin and increase The film layer is dense and improves the abrasion resistance of the film layer;
  • the processing technology of the abrasion-resistant plastic packaging bag includes the following steps:
  • Step S1 Preparation of environmentally friendly substrate layer 1: Put polylactic acid into a film blowing machine, adjust the temperature of the film blowing machine to 200-220 ° C, and blow-mold to obtain an environmentally friendly substrate layer 1;
  • Step S2 Preparation of abrasion-resistant layer 3 and abrasion-resistant protrusion 4: Mix the modified silicone resin, hydroxy silicone oil, sol, boehmite, and tetraethylammonium benzoate according to the mixing ratio, and place them as shown in Figure 2.
  • the mold shown the mold is placed in a flat hydraulic press for laminating.
  • the laminating temperature is 45 ° C, constant pressure 0.6MPa, holding pressure 45-50s, take out, and cool at room temperature and pressure to obtain an integrally formed wear layer 3 and Wear-resistant protrusion 4;
  • Step S3 Mix the nano titanium dioxide and the acrylate adhesive according to the mass ratio of 1: 0.8-1, put them in a spray gun, spray them evenly on the smooth side surface of the wear-resistant layer 3, and then cover the environmental protection substrate layer. 1. Place the laminated body in a flat hydraulic press, press the temperature of 48 °C, apply pressure of 0.4MPa, and maintain the pressure for 55-60s to obtain a plastic film;
  • Step S4 The plastic film is placed on the feeding device of the bag making machine, and the plastic film is cut. After the cutting, the bottom and both sides of the bag body are heat-sealed and edge-sealed separately, and the edge-sealed bag body is die-molded. The punching process punches out the lifting hole on the bag body handle to obtain a wear-resistant plastic packaging bag.
  • An abrasion-resistant plastic packaging bag includes an inner environmentally friendly substrate layer, a middle interlayer, and an outer abrasion-resistant layer.
  • the surface of the abrasion-resistant layer is evenly distributed with abrasion-resistant protrusions, and the abrasion-resistant layer and abrasion-resistant protrusions. All of them are made of special wear-resistant materials, and the wear-resistant layer is integrated with the wear-resistant protrusions;
  • the environmental protection substrate layer is made of polylactic acid, and the thickness of the environmental protection substrate layer is 0.15mm;
  • the interlayer uses nano titanium dioxide, and the thickness of the interlayer is 0.3mm;
  • the thickness of the wear layer is 0.3mm
  • the wear-resistant protrusion is in the shape of a hemisphere, the arc surface of the hemisphere faces outward, and the diameter of the hemisphere is 0.05mm;
  • the special wear-resistant material is made of the following main parts by weight: 50 parts of modified silicone resin, 6 parts of hydroxy silicone oil, 15 parts of sol, 3 parts of boehmite, and 1 part of tetraethylammonium benzoate.
  • An abrasion-resistant plastic packaging bag includes an inner environmentally friendly substrate layer, a middle interlayer, and an outer abrasion-resistant layer.
  • the surface of the abrasion-resistant layer is evenly distributed with abrasion-resistant protrusions, and the abrasion-resistant layer and abrasion-resistant protrusions. All of them are made of special wear-resistant materials, and the wear-resistant layer is integrated with the wear-resistant protrusions;
  • the environmental protection substrate layer is made of polylactic acid, and the thickness of the environmental protection substrate layer is 0.2mm;
  • the interlayer uses nano titanium dioxide, and the thickness of the interlayer is 0.4mm;
  • the thickness of the wear layer is 0.35mm;
  • the wear-resistant protrusion is in the shape of a hemisphere, the arc surface of the hemisphere faces outward, and the diameter of the hemisphere is 0.06mm;
  • the special wear-resistant material is made of the following main parts by weight: 55 parts of modified silicone resin, 8 parts of hydroxy silicone oil, 17 parts of sol, 4 parts of boehmite, and 1.2 parts of tetraethylammonium benzoate.
  • An abrasion-resistant plastic packaging bag includes an inner environmentally friendly substrate layer, a middle interlayer, and an outer abrasion-resistant layer.
  • the surface of the abrasion-resistant layer is evenly distributed with abrasion-resistant protrusions, and the abrasion-resistant layer and abrasion-resistant protrusions. All of them are made of special wear-resistant materials, and the wear-resistant layer is integrated with the wear-resistant protrusions;
  • the environmental protection substrate layer is made of polylactic acid, and the thickness of the environmental protection substrate layer is 0.25mm;
  • the interlayer uses nano titanium dioxide, and the thickness of the interlayer is 0.5mm;
  • the thickness of the wear layer is 0.4mm
  • the wear-resistant protrusion is in the shape of a hemisphere, the arc surface of the hemisphere faces outward, and the diameter of the hemisphere is 0.07mm;
  • the special wear-resistant material is made of the following main parts by weight: 60 parts of modified silicone resin, 9 parts of hydroxy silicone oil, 20 parts of sol, 5 parts of boehmite, and 1.5 parts of tetraethylammonium benzoate;
  • the CMT4104 tensile tester was used to perform the tensile test on the plastic packaging bag samples of Examples 1-3 according to GB / T528-2009, the tensile rate was 200mm / min, the test temperature was 22.5 ° C, and the relative humidity was 50%;
  • the 100% tensile modulus of Examples 1-3 is 2.07-2.48 MPa, the tensile strength is 45.7-62.9N, and the elongation at break is 380-536%.

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Abstract

一种耐磨塑料包装袋及其加工工艺，包装袋包括内层的环保衬底层（1）、中间的夹层（2）以及外层的耐磨层（3），耐磨层（3）的表面还均布有耐磨凸起（4），耐磨层（3）与耐磨凸起（4）均采用特制的耐磨材料制成，耐磨层（3）与耐磨凸起（4）一体成型；加工工艺包括如下步骤：步骤S1、环保衬底层（1）的制备；步骤S2、耐磨层（3）以及耐磨凸起（4）的制备；步骤S3、塑料薄膜的制备；步骤S4、切割、热封封边、冲压加工，得到耐磨塑料包装袋。该塑料包装袋的环保衬底层（1）采用聚乳酸制成，聚乳酸的生产过程无污染，而且产品可以生物降解，对人体无毒害，无毒环保，可以存放食物；外层的耐磨层（3）具有优异的耐磨效果，能够提高塑料包装袋使用寿命，并且生产成本低。

Description

一种耐磨塑料包装袋及其加工工艺 技术领域
本发明属于塑料包装袋加工技术领域，具体地，涉及一种耐磨塑料包装袋及其加工工艺。
背景技术
塑料购物袋是日常生活中的必需品，众所周知，现在消费者和商场都已形成对塑料包装袋消费的硬性需求，而且这种消费已经成为一种习惯，塑料包装袋已融入大家的生活中。在日常生活中，塑料包装袋由于重量轻、使用方便，日益成为包装制品的首选。在发展中国家，由于商业化进程导致商城数量稳步增加，从而带动了塑料包装袋行业的进一步繁荣，两者呈现出高度的相关性。全球塑料包装袋行业总体呈现出稳步增长的发展趋势，尤是发展中国家对塑料包装袋的需求总量仍呈现迅猛的增长势头，从而推动塑料包装袋行业的持续增长和繁荣。
现有塑料袋大多材质及结构较为简单，使用时极易损坏，并且由于采用多种添加剂成分制成，无法存放食物，避免影响人体健康，使用时相当不便。
发明内容
本发明的目的在于提供一种耐磨塑料包装袋及其加工工艺，以解决现有技术中的如下技术问题：(1)现有塑料袋材质及结构简单，使用时易损坏：(2)塑料包装袋的材质不够健康、环保，无法存放食物。
本发明的目的可以通过以下技术方案实现：
一种耐磨塑料包装袋，包括内层的环保衬底层、中间的夹层以及外层的耐 磨层，所述耐磨层的表面还均布有耐磨凸起，所述耐磨层与耐磨凸起均采用特制的耐磨材料制成，所述耐磨层与耐磨凸起一体成型；
所述耐磨塑料包装袋由如下步骤加工而成：
步骤S1、环保衬底层的制备：将聚乳酸放入吹膜机中，吹膜机温度调至200-220℃，吹膜成型，得到环保衬底层；
步骤S2、耐磨层以及耐磨凸起的制备：将改性有机硅树脂、羟基硅油、溶胶、勃姆石、苯甲酸四乙基铵按照配比混合均匀，放在模具里，将模具置于平板液压机间进行压膜，压膜温度为45℃，恒压0.6MPa，保压45-50s，取出，常温常压冷却，得到一体成型的耐磨层和耐磨凸起；
步骤S3、将纳米钛白粉和丙烯酸酯胶黏剂按照质量之比为1:0.8-1混合均匀，置于喷枪中，均匀喷涂于耐磨层的光滑一侧表面，再覆盖上环保衬底层，将覆合体置于平板液压机间，压合温度48℃，施压0.4MPa，保压55-60s，制得塑料薄膜；
步骤S4、将塑料薄膜置于制袋机的进料装置上，对塑料薄膜进行切割，切割后对袋体的底部和两侧分别进行热封封边，对封边后的袋体进行刀模冲压加工，冲出袋体提手上的提孔，得到耐磨塑料包装袋。
进一步地，所述环保衬底层采用聚乳酸制成，所述环保衬底层的厚度为0.15-0.25mm。
进一步地，所述夹层采用纳米钛白粉，所述夹层的厚度为0.3-0.5mm。
进一步地，所述耐磨层的厚度为0.3-0.4mm。
进一步地，所述耐磨凸起为半球体形状，半球体的圆弧面朝向外侧，半球体的直径为0.05-0.07mm。
进一步地，所述特制的耐磨材料，由如下重量份的主要原料制成：改性有 机硅树脂50-60份、羟基硅油6-9份、溶胶15-20份、勃姆石3-5份、苯甲酸四乙基铵1-1.5份。
进一步地，所述改性有机硅树脂由如下步骤制备而成：1)将二甲基二甲氧基硅烷、正硅酸乙酯以及冰醋酸加入三口烧瓶中，置于水浴锅内，搅拌升温至57-59℃，采用恒压滴液漏斗滴加甲基丙烯酸甲酯，恒温反应100-110min；再升温至93-95℃，搅拌6.5-7.5h，停止加热，冷却至35-38℃，然后缓慢加热至120℃进行减压蒸馏，得到第一产物；
其中，二甲基二甲氧基硅烷、正硅酸乙酯、冰醋酸、甲基丙烯酸甲酯的物质的量之比为1:1:0.3-0.4:1.5-1.8；
2)将苯基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷以及上述第一产物加入三口烧瓶中，并用恒压滴液漏斗滴入10％稀盐酸，保持2-3s每滴的滴加速度，置于油浴锅内，升温至38-40℃，恒温水解55-60min；继续升温至62-65℃，反应110-115min；自然冷却至室温后进行蒸馏反应，蒸馏温度85℃，蒸馏2.6-3h，得到改性有机硅树脂；
其中，苯基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷和第一产物的物质的量之比为1:1：0.5-0.6。
进一步地，所述溶胶由如下方法制备而成：将硝酸铝加入乙醇中充分搅拌配制成溶液，待搅拌均匀后将乙醇胺缓慢滴加到上述溶液中再搅拌65-70min，将此混合液放入60℃恒温水浴锅中搅拌80-90min，制得溶胶；
其中，三氯化铝、乙醇、三乙醇胺的物质的量之比为1:10-12:2-2.5。
一种耐磨塑料包装袋的加工工艺，包括如下步骤：
步骤S1、环保衬底层的制备：将聚乳酸放入吹膜机中，吹膜机温度调至200-220℃，吹膜成型，得到环保衬底层；
步骤S2、耐磨层以及耐磨凸起的制备：将改性有机硅树脂、羟基硅油、溶胶、勃姆石、苯甲酸四乙基铵按照配比混合均匀，放在模具里，将模具置于平板液压机间进行压膜，压膜温度为45℃，恒压0.6MPa，保压45-50s，取出，常温常压冷却，得到一体成型的耐磨层和耐磨凸起；
步骤S3、将纳米钛白粉和丙烯酸酯胶黏剂按照质量之比为1:0.8-1混合均匀，置于喷枪中，均匀喷涂于耐磨层的光滑一侧表面，再覆盖上环保衬底层，将覆合体置于平板液压机间，压合温度48℃，施压0.4MPa，保压55-60s，制得塑料薄膜；
步骤S4、将塑料薄膜置于制袋机的进料装置上，对塑料薄膜进行切割，切割后对袋体的底部和两侧分别进行热封封边，对封边后的袋体进行刀模冲压加工，冲出袋体提手上的提孔，得到耐磨塑料包装袋。
本发明的有益效果：
(1)本发明的塑料包装袋的耐磨层采用特制的耐磨材料，耐磨材料以改性有机硅树脂作为基料，甲基丙烯酸酯基团和有机硅聚合物能够形成稳定的C-O-Si键，不会发生键接水解失效，能够达到预期的改性效果，使得改性有机硅树脂同时具备有机和无机材料的复合性能；同时，改性有机硅树脂拥有O-Si-O网状结构作为骨架，作为薄膜主体可提高膜层的致密性，三官能链节含量较高，交联密度大，形成网状交联共聚物，使得膜层硬度大，从而提高膜层的耐磨性；同时，乙醇胺铝溶胶掺入进耐磨材料层中时，在加热条件下，会分解产生三氧化二铝，三氧化二铝均匀分散在耐磨材料中，可以填补有机硅树脂之间的间隙，增加膜层致密度，提高膜层的耐磨性；所述耐磨材料制成的耐磨性强，作为塑料包装袋的最外层，能够提高塑料包装袋的耐磨性；
(2)本发明的塑料袋的外层耐磨层的表面设有同样耐磨材料的耐磨凸起， 该耐磨凸起均匀分布，能够分散施加于塑料袋表面的应力，提高塑料包装袋的强度；
(3)本发明的塑料包装袋，包括内层的环保衬底层、中间的夹层以及外层的耐磨层，环保衬底层采用聚乳酸制成，聚乳酸的生产过程无污染，而且产品可以生物降解，对人体无毒害，无毒环保，可以存放食物；夹层采用纳米钛白粉，纳米钛白粉具有抗紫外线、抗菌、自洁净、抗老化功效；外层的耐磨层具有优异的耐磨效果，能够提高塑料包装袋使用寿命，并且生产成本低。
附图说明
为了便于本领域技术人员理解，下面结合附图对本发明作进一步的说明。
图1为本发明一种耐磨塑料包装袋的结构示意图；
图2为本发明一种耐磨塑料包装袋的加工工艺中用到的模具的结构示意图。
具体实施方式
下面将结合实施例对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
一种耐磨塑料包装袋，如图1所示，包括内层的环保衬底层1、中间的夹层2以及外层的耐磨层3，其中，耐磨层3的表面还均布有耐磨凸起4，耐磨层3与耐磨凸起4均采用特制的耐磨材料制成，耐磨层3与耐磨凸起4一体成型；
环保衬底层1采用聚乳酸制成，环保衬底层1的厚度为0.15-0.25mm；
夹层2采用纳米钛白粉，夹层2的厚度为0.3-0.5mm；
耐磨层3的厚度为0.3-0.4mm；
耐磨凸起4为半球体形状，半球体的圆弧面朝向外侧，半球体的直径为 0.05-0.07mm；
所述特制的耐磨材料，由如下重量份的主要原料制成：改性有机硅树脂50-60份、羟基硅油6-9份、溶胶15-20份、勃姆石3-5份、苯甲酸四乙基铵1-1.5份；
改性有机硅树脂由如下步骤制备而成：(1)将二甲基二甲氧基硅烷、正硅酸乙酯以及冰醋酸加入三口烧瓶中，置于水浴锅内，搅拌升温至57-59℃，采用恒压滴液漏斗滴加甲基丙烯酸甲酯，恒温反应100-110min；再升温至93-95℃，搅拌6.5-7.5h，停止加热，冷却至35-38℃，然后缓慢加热至120℃进行减压蒸馏，得到第一产物；
其中，二甲基二甲氧基硅烷、正硅酸乙酯、冰醋酸、甲基丙烯酸甲酯的物质的量之比为1:1:0.3-0.4:1.5-1.8；
(2)将苯基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷以及上述第一产物加入三口烧瓶中，并用恒压滴液漏斗滴入10％稀盐酸(保持2-3s每滴的滴加速度)，置于油浴锅内，升温至38-40℃，恒温水解55-60min；继续升温至62-65℃，反应110-115min；自然冷却至室温后进行蒸馏反应，蒸馏温度85℃，蒸馏2.6-3h，得到改性有机硅树脂；
其中，苯基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷和第一产物的物质的量之比为1:1：0.5-0.6；
甲基丙烯酸酯基团和有机硅聚合物能够形成稳定的C-O-Si键，不会发生键接水解失效，能够达到预期的改性效果，使得改性有机硅树脂同时具备有机和无机材料的复合性能；同时，改性有机硅树脂拥有O-Si-O网状结构作为骨架，作为薄膜主体可提高膜层的致密性，三官能链节含量较高，交联密度大，形成网状交联共聚物，使得膜层硬度大，从而提高膜层的耐磨性；
溶胶：将硝酸铝加入乙醇中充分搅拌配制成溶液，待搅拌均匀后将乙醇胺缓慢滴加到上述溶液中再搅拌65-70min，将此混合液放入60℃恒温水浴锅中搅拌80-90min，制得溶胶；
其中，三氯化铝、乙醇、三乙醇胺的物质的量之比为1:10-12:2-2.5；
硝酸铝可以在乙醇溶液中发生醇解，同时由于水的存在，溶液中也存在着水解反应，生成的Al(OC 2H 5) 3和Al(OH) 3与乙醇胺反应，产生了乙醇胺铝溶胶；乙醇胺铝溶胶掺入进耐磨材料层中时，在加热条件下，会分解产生三氧化二铝，三氧化二铝均匀分散在耐磨材料中，可以填补有机硅树脂之间的间隙，增加膜层致密度，提高膜层的耐磨性；
所述耐磨塑料包装袋的加工工艺，包括如下步骤：
步骤S1、环保衬底层1的制备：将聚乳酸放入吹膜机中，吹膜机温度调至200-220℃，吹膜成型，得到环保衬底层1；
步骤S2、耐磨层3以及耐磨凸起4的制备：将改性有机硅树脂、羟基硅油、溶胶、勃姆石、苯甲酸四乙基铵按照配比混合均匀，放在如图2所示的模具里，将模具置于平板液压机间进行压膜，压膜温度为45℃，恒压0.6MPa，保压45-50s，取出，常温常压冷却，得到一体成型的耐磨层3和耐磨凸起4；
步骤S3、将纳米钛白粉和丙烯酸酯胶黏剂按照质量之比为1:0.8-1混合均匀，置于喷枪中，均匀喷涂于耐磨层3的光滑一侧表面，再覆盖上环保衬底层1，将覆合体置于平板液压机间，压合温度48℃，施压0.4MPa，保压55-60s，制得塑料薄膜；
步骤S4、将塑料薄膜置于制袋机的进料装置上，对塑料薄膜进行切割，切割后对袋体的底部和两侧分别进行热封封边，对封边后的袋体进行刀模冲压加工，冲出袋体提手上的提孔，得到耐磨塑料包装袋。
实施例1
一种耐磨塑料包装袋，包括内层的环保衬底层、中间的夹层以及外层的耐磨层，其中，耐磨层的表面还均布有耐磨凸起，耐磨层与耐磨凸起均采用特制的耐磨材料制成，耐磨层与耐磨凸起一体成型；
环保衬底层采用聚乳酸制成，环保衬底层的厚度为0.15mm；
夹层采用纳米钛白粉，夹层的厚度为0.3mm；
耐磨层的厚度为0.3mm；
耐磨凸起为半球体形状，半球体的圆弧面朝向外侧，半球体的直径为0.05mm；
所述特制的耐磨材料，由如下重量份的主要原料制成：改性有机硅树脂50份、羟基硅油6份、溶胶15份、勃姆石3份、苯甲酸四乙基铵1份。
实施例2
一种耐磨塑料包装袋，包括内层的环保衬底层、中间的夹层以及外层的耐磨层，其中，耐磨层的表面还均布有耐磨凸起，耐磨层与耐磨凸起均采用特制的耐磨材料制成，耐磨层与耐磨凸起一体成型；
环保衬底层采用聚乳酸制成，环保衬底层的厚度为0.2mm；
夹层采用纳米钛白粉，夹层的厚度为0.4mm；
耐磨层的厚度为0.35mm；
耐磨凸起为半球体形状，半球体的圆弧面朝向外侧，半球体的直径为0.06mm；
所述特制的耐磨材料，由如下重量份的主要原料制成：改性有机硅树脂55份、羟基硅油8份、溶胶17份、勃姆石4份、苯甲酸四乙基铵1.2份。
实施例3
一种耐磨塑料包装袋，包括内层的环保衬底层、中间的夹层以及外层的耐磨层，其中，耐磨层的表面还均布有耐磨凸起，耐磨层与耐磨凸起均采用特制的耐磨材料制成，耐磨层与耐磨凸起一体成型；
环保衬底层采用聚乳酸制成，环保衬底层的厚度为0.25mm；
夹层采用纳米钛白粉，夹层的厚度为0.5mm；
耐磨层的厚度为0.4mm；
耐磨凸起为半球体形状，半球体的圆弧面朝向外侧，半球体的直径为0.07mm；
所述特制的耐磨材料，由如下重量份的主要原料制成：改性有机硅树脂60份、羟基硅油9份、溶胶20份、勃姆石5份、苯甲酸四乙基铵1.5份；
采用CMT4104型拉力试验机对实施例1-3的塑料包装袋样品按GB/T 528—2009进行拉伸测试，拉伸速率为200mm/min，测试温度为22.5℃，相对湿度为50％；
实施例 100％拉伸模量/MPa 拉伸强度/N 断裂伸出率/％
1 2.07 45.7 380
2 2.33 55.6 421
3 2.48 62.9 536
实施例1-3的100％拉伸模量为2.07-2.48MPa，拉伸强度为45.7-62.9N，断裂伸长率为380-536％。
以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节，也不限制该发明仅为所述的具体实施方式。显然，根据本说明书的内容，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。

Claims (9)

  1. 一种耐磨塑料包装袋，其特征在于，包括内层的环保衬底层(1)、中间的夹层(2)以及外层的耐磨层(3)，所述耐磨层(3)的表面还均布有耐磨凸起(4)，所述耐磨层(3)与耐磨凸起(4)均采用特制的耐磨材料制成，所述耐磨层(3)与耐磨凸起(4)一体成型；
    所述耐磨塑料包装袋由如下步骤加工而成：
    步骤S1、环保衬底层(1)的制备：将聚乳酸放入吹膜机中，吹膜机温度调至200-220℃，吹膜成型，得到环保衬底层(1)；
    步骤S2、耐磨层(3)以及耐磨凸起(4)的制备：将改性有机硅树脂、羟基硅油、溶胶、勃姆石、苯甲酸四乙基铵按照配比混合均匀，放在模具里，将模具置于平板液压机间进行压膜，压膜温度为45℃，恒压0.6MPa，保压45-50s，取出，常温常压冷却，得到一体成型的耐磨层(3)和耐磨凸起(4)；
    步骤S3、将纳米钛白粉和丙烯酸酯胶黏剂按照质量之比为1:0.8-1混合均匀，置于喷枪中，均匀喷涂于耐磨层(3)的光滑一侧表面，再覆盖上环保衬底层(1)，将覆合体置于平板液压机间，压合温度48℃，施压0.4MPa，保压55-60s，制得塑料薄膜；
    步骤S4、将塑料薄膜置于制袋机的进料装置上，对塑料薄膜进行切割，切割后对袋体的底部和两侧分别进行热封封边，对封边后的袋体进行刀模冲压加工，冲出袋体提手上的提孔，得到耐磨塑料包装袋。
  2. 根据权利要求1所述的一种耐磨塑料包装袋，其特征在于，所述环保衬底层(1)采用聚乳酸制成，所述环保衬底层(1)的厚度为0.15-0.25mm。
  3. 根据权利要求1所述的一种耐磨塑料包装袋，其特征在于，所述夹层(2)采用纳米钛白粉，所述夹层(2)的厚度为0.3-0.5mm。
  4. 根据权利要求1所述的一种耐磨塑料包装袋，其特征在于，所述耐磨层(3)的厚度为0.3-0.4mm。
  5. 根据权利要求1所述的一种耐磨塑料包装袋，其特征在于，所述耐磨凸起(4)为半球体形状，半球体的圆弧面朝向外侧，半球体的直径为0.05-0.07mm。
  6. 根据权利要求1所述的一种耐磨塑料包装袋，其特征在于，所述特制的耐磨材料，由如下重量份的主要原料制成：改性有机硅树脂50-60份、羟基硅油6-9份、溶胶15-20份、勃姆石3-5份、苯甲酸四乙基铵1-1.5份。
  7. 根据权利要求6所述的一种耐磨塑料包装袋，其特征在于，所述改性有机硅树脂由如下步骤制备而成：1)将二甲基二甲氧基硅烷、正硅酸乙酯以及冰醋酸加入三口烧瓶中，置于水浴锅内，搅拌升温至57-59℃，采用恒压滴液漏斗滴加甲基丙烯酸甲酯，恒温反应100-110min；再升温至93-95℃，搅拌6.5-7.5h，停止加热，冷却至35-38℃，然后缓慢加热至120℃进行减压蒸馏，得到第一产物；
    其中，二甲基二甲氧基硅烷、正硅酸乙酯、冰醋酸、甲基丙烯酸甲酯的物质的量之比为1:1:0.3-0.4:1.5-1.8；
    2)将苯基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷以及上述第一产物加入三口烧瓶中，并用恒压滴液漏斗滴入10％稀盐酸，保持2-3s每滴的滴加速度，置于油浴锅内，升温至38-40℃，恒温水解55-60min；继续升温至62-65℃，反应110-115min；自然冷却至室温后进行蒸馏反应，蒸馏温度85℃，蒸馏2.6-3h，得到改性有机硅树脂；
    其中，苯基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷和第一产物的物质的量之比为1:1：0.5-0.6。
  8. 根据权利要求6所述的一种耐磨塑料包装袋，其特征在于，所述溶胶由 如下方法制备而成：将硝酸铝加入乙醇中充分搅拌配制成溶液，待搅拌均匀后将乙醇胺缓慢滴加到上述溶液中再搅拌65-70min，将此混合液放入60℃恒温水浴锅中搅拌80-90min，制得溶胶；
    其中，三氯化铝、乙醇、三乙醇胺的物质的量之比为1:10-12:2-2.5。
  9. 一种耐磨塑料包装袋的加工工艺，其特征在于，包括如下步骤：
    步骤S1、环保衬底层(1)的制备：将聚乳酸放入吹膜机中，吹膜机温度调至200-220℃，吹膜成型，得到环保衬底层(1)；
    步骤S2、耐磨层(3)以及耐磨凸起(4)的制备：将改性有机硅树脂、羟基硅油、溶胶、勃姆石、苯甲酸四乙基铵按照配比混合均匀，放在模具里，将模具置于平板液压机间进行压膜，压膜温度为45℃，恒压0.6MPa，保压45-50s，取出，常温常压冷却，得到一体成型的耐磨层(3)和耐磨凸起(4)；
    步骤S3、将纳米钛白粉和丙烯酸酯胶黏剂按照质量之比为1:0.8-1混合均匀，置于喷枪中，均匀喷涂于耐磨层(3)的光滑一侧表面，再覆盖上环保衬底层(1)，将覆合体置于平板液压机间，压合温度48℃，施压0.4MPa，保压55-60s，制得塑料薄膜；
    步骤S4、将塑料薄膜置于制袋机的进料装置上，对塑料薄膜进行切割，切割后对袋体的底部和两侧分别进行热封封边，对封边后的袋体进行刀模冲压加工，冲出袋体提手上的提孔，得到耐磨塑料包装袋。
PCT/CN2019/100424 2018-08-14 2019-08-13 一种耐磨塑料包装袋及其加工工艺 WO2020034959A1 (zh)

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