CN-119704837-B - Liner bag of shielding ton bag and preparation method thereof

Abstract

The application relates to the technical field of lining materials of ton bags, and particularly discloses a shielding ton bag lining bag and a preparation method thereof. A lining bag of a shielding ton bag is prepared by processing a multi-layer composite film with a structure of PET/light-shielding breathable moisture-permeable layer/PA/PE, wherein the light-shielding breathable moisture-permeable layer is prepared from the following raw materials, by weight, 40-75 parts of resin materials, 20-40 parts of heavy calcium carbonate, 5-10 parts of color master batch, 2-5 parts of dispersing agents, 0.2-0.4 part of antioxidants, 4-6 parts of polyimide nano fibers and 1-3 parts of porous diatomite, and the preparation method comprises the steps of uniformly mixing the resin materials, the heavy calcium carbonate, the color master batch, the dispersing agents, the antioxidants, the polyimide nano fibers and the porous diatomite, extruding and granulating to obtain a light-shielding breathable moisture-permeable layer material, and then taking the light-shielding breathable moisture-permeable layer material, carrying out four-layer coextrusion blow molding on the PET, the PA and the PE to obtain the multi-layer composite film, and processing the multi-layer composite film. The lining bag of the shielding ton bag can exert excellent and stable air permeability and moisture permeability under the influence of temperature change environment.

Inventors

• QIU JING
• YU WENJUN

Assignees

• 上海唐科新材料科技有限公司

Dates

Publication Date

20260508

Application Date

20241230

Claims (10)

1. 1. The lining bag of the shielding ton bag is characterized by being processed by a multi-layer composite film with a structure of PET/a light-shielding breathable moisture-permeable layer/PA/PE, and the light-shielding breathable moisture-permeable layer comprises the following raw materials in parts by weight: 40-75 parts of resin material; 20-40 parts of heavy calcium carbonate; 5-10 parts of color masterbatch; 2-5 parts of dispersing agent; 0.2-0.4 part of antioxidant; 4-6 parts of polyimide nano fiber; 1-3 parts of porous diatomite.
2. 2. The lining bag of a shielding ton bag according to claim 1, wherein the weight ratio of polyimide nano fiber to porous diatomite is 2:1.
3. 3. The lining bag of the shielding ton bag according to claim 1, wherein the diameter of the polyimide nano fiber is 150-250nm, the pore diameter of the porous diatomite is 1-2 μm, and the particle size is 10-15 μm.
4. 4. The lining bag of the shielding ton bag according to claim 1, wherein 3-7 parts by weight of functional auxiliary agent is added into the raw material of the shading breathable moisture-permeable layer, the functional auxiliary agent consists of polytetrafluoroethylene and nano heat-conducting filler, and the weight ratio of the polytetrafluoroethylene to the nano heat-conducting filler is 1 (4-8).
5. 5. The lining bag of the shielding ton bag of claim 4, wherein the weight ratio of polytetrafluoroethylene to nano heat-conducting filler is 1:6.
6. 6. The lining bag of the shielding ton bag of claim 4, wherein the nano heat-conducting filler is composed of boron nitride and silicon carbide in a weight ratio of (2-5): 1.
7. 7. The lining bag of the shielding ton bag of claim 4, wherein the particle size of the nano heat-conducting filler is 50-100nm.
8. 8. The lining bag of the shielding ton bag according to claim 1, wherein the dispersing agent is one or a combination of more of stearamide, hexenyl distearamide, glyceryl monostearate, glyceryl tristearate, microcrystalline paraffin, barium stearate, zinc stearate, calcium stearate, ethylene-acrylic acid copolymer and ethylene-vinyl acetate copolymer.
9. 9. The lining bag of the shielding ton bag of claim 1, wherein the antioxidant is one or a combination of a plurality of di-tert-butylphenol, triphenyl phosphate, o-phenylenediamine and catechol.
10. 10. The method for preparing the lining bag of the shielding ton bag according to claim 1, which is characterized by comprising the following steps: (1) Preparing raw materials comprising resin materials, heavy calcium carbonate, color concentrates, dispersing agents, antioxidants, polyimide nanofibers and porous diatomite according to a proportion; (2) Uniformly mixing the resin material, heavy calcium carbonate, color masterbatch, dispersing agent, antioxidant, polyimide nano fiber and porous diatomite in the step (1), and extruding and granulating to obtain a shading breathable moisture permeable layer material; (3) And (3) carrying out four-layer coextrusion blow molding on the shading breathable moisture-permeable layer material obtained in the step (2) and PET, PA and PE to obtain a multi-layer composite film with a structure of PET/shading breathable moisture-permeable layer/PA/PE, and then carrying out bag making processing to obtain the lining bag of the shielding ton bag.

Description

Liner bag of shielding ton bag and preparation method thereof Technical Field The application relates to the technical field of lining materials of ton bags, in particular to a shielding ton bag lining bag and a preparation method thereof. Background The ton bag is a flexible transport packaging container, has the advantages of moisture resistance, dust resistance, radiation resistance, firmness and safety, and has enough strength structurally, and the loading and unloading efficiency is obviously improved and the development is very fast in recent years because the flexible transport packaging container is convenient to load and unload and carry. The lining bag is sleeved in the ton bag generally, so that the ton bag has better bearing capacity, the safety of cargoes in the transportation or stacking process is guaranteed, and the cargoes can be protected from being polluted and damaged by external environments, such as dust prevention, moisture prevention, static electricity prevention and the like. The structure of the lining bag of the ton bag is usually made of multilayer co-extrusion materials, and common materials of the lining bag of the ton bag comprise multilayer composite materials such as PET/Al/PA/PE, PA/Al/PE, PET/Al/PE and the like, wherein an aluminum foil layer has excellent barrier property, a good shading effect and a moisture permeability and ventilation effect of up to below 0.05, and the materials combine the advantages of different materials through a composite process, and the lining bag has soft hand feeling and lower cost, so that the lining bag has wide applicability. When the lining bag of the ton bag is used for some fresh foods, the lining bag not only needs better shading effect, but also has good moisture permeability and ventilation effect, so that the moisture in the goods can be dispersed, the risks of the goods being wet and moldy can be reduced, and particularly, for the goods which are easy to wet and moldy, such as agricultural products, foods and the like, the good ventilation performance can prolong the shelf life of the goods, and the quality of the goods can be maintained. Therefore, the Al in the multilayer composite is generally replaced with a black air-permeable and moisture-permeable material, which not only has a good light-shielding effect, but also can improve the air-permeability and moisture-permeability of the liner bag of the ton bag, thereby meeting the requirements of the use of the fresh food. In view of the above-mentioned related art, the inventors believe that the above-mentioned black breathable moisture-permeable material is susceptible to environmental factors during application, and especially when the external environment temperature changes in a large span, the structure of the black breathable moisture-permeable material is greatly damaged, thereby affecting the stable performance of the air and moisture permeability. Therefore, there is a need to propose a solution to the above technical problems. Disclosure of Invention The application provides a shielding ton bag lining bag and a preparation method thereof in order to enable the ventilation and moisture permeability of the ton bag lining bag to be exerted stably under the influence of temperature change environment. In a first aspect, the application provides a lining bag of a shielding ton bag, which adopts the following technical scheme: The lining bag of the shielding ton bag is prepared by processing a multilayer composite film with a structure of PET/a light-shielding breathable moisture-permeable layer/PA/PE, and the light-shielding breathable moisture-permeable layer is prepared from the following raw materials in parts by weight: 40-75 parts of resin material; 20-40 parts of heavy calcium carbonate; 5-10 parts of color masterbatch; 2-5 parts of dispersing agent; 0.2-0.4 part of antioxidant; 4-6 parts of polyimide nano fiber; 1-3 parts of porous diatomite. By adopting the technical scheme, in the bag body structure of the lining bag of the shielding ton bag, the PET is arranged on the outermost layer, good rigidity, transparency and barrier performance are provided, the shading breathable moisture-permeable layer can play a good shading effect and bring about excellent breathable moisture-permeable performance, the PA is used for enhancing the strength, puncture resistance and chemical stability of the multilayer composite film, the PE is used as the innermost layer, and good heat sealing performance and flexibility are provided, so that the lining bag of the shielding ton bag manufactured by processing the multilayer composite film with the structure can meet the use requirement of fresh foods and bring about excellent application effect. In the preparation process of the light-shielding breathable moisture-permeable layer, the calcium carbonate particles and the plastic film matrix are separated to form uniform micropores, wherein the micropores are key to the light-shielding br