Biodegradable paper-plastic composite structure and preparation method thereof

A paper-plastic composite and biodegradable technology, applied in chemical instruments and methods, paper/cardboard layered products, cellulose plastic layered products, etc.

Pending Publication Date: 2020-08-18
NANTONG CELLULOSE FIBERS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Aiming at the technical requirement of packable film, the purpose of this invention is to provide a biodegradable material to make environmentally friendly paper-plastic composite structure, which can be applied to packaging materials and can be naturally degraded to eliminate or reduce the related environmental pollution problems

Method used

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  • Biodegradable paper-plastic composite structure and preparation method thereof
  • Biodegradable paper-plastic composite structure and preparation method thereof
  • Biodegradable paper-plastic composite structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 1) The cellulose acetate was crushed into a powder with a particle size of 200 μm in a grinder (the degree of acetyl substitution was 2.45, the intrinsic viscosity was 1.54 dL / g, the number average molecular weight was 37000, the weight average molecular weight was 63000, and the Mw / Mn was 1.7).

[0086] 2) Dry 70 parts of cellulose acetate powder at 120° C. for 2 hours, mix with 30 parts of glyceryl triacetate and 1 part of antioxidant 1010, and mix them uniformly on a mixer.

[0087] 3) Add the above-mentioned powder into the twin-screw extruder for plasticization and extrusion. The temperatures of the six heating zones of the twin-screw machine are 130 / 150 / 165 / 180 / 190 / 190 respectively, and the temperature of the head is 190°C. The head pressure is 0.2-0.4Mpa, and the screw speed is 50-90 rpm.

[0088] 4) The extruded filaments are stretched, cooled, and pelletized to make cellulose acetate plastic particles. The melt index is 100g / 10min.

Embodiment 2

[0090] 1) The cellulose acetate was crushed into a powder with a particle size of 200 μm in a grinder (the degree of acetyl substitution was 2.45, the intrinsic viscosity was 1.54 dL / g, the number average molecular weight was 37000, the weight average molecular weight was 63000, and the Mw / Mn was 1.7).

[0091] 2) After drying 70 parts of cellulose acetate powder at 120° C. for 2 hours, mix with 30 parts of triethylene glycol dimethyl ether and 1 part of antioxidant 1010 on a mixer.

[0092] 3) Add the above-mentioned powder into the twin-screw extruder for plasticization and extrusion. The temperatures of the six heating zones of the twin-screw machine are 130 / 150 / 165 / 180 / 190 / 190 respectively, and the temperature of the head is 190°C. The head pressure is 0.2-0.4Mpa, and the screw speed is 50-90 rpm.

[0093] 4) The extruded filaments are stretched, cooled, and pelletized to make cellulose acetate plastic particles. The melt index was 310 g / 10 min.

Embodiment 3

[0095] 1) Put the particles in Example 1 into a twin-screw extruder, heat at 200° C., and extrude through a die with a thickness of 1 mm to form a film.

[0096] 2) Stretching by stretching rollers 5 times to obtain a film with a thickness of 100 μm.

[0097] The contact angle of the prepared film was 76 degrees.

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Abstract

A biodegradable paper-plastic composite structure comprises: at least one cellulose acetate or derivative film thereof; the invention discloses a paper base material. The cellulose acetate or cellulose acetate derivative film is combined with a paper base material to form a paper-plastic composite structure. The cellulosic material included in the formulation includes cellulose acetate having a degree of substitution of 1.5 to 2.8 or a derivative thereof; and a plasticizer capable of reducing the softening temperature of cellulose is also included. The basic paper material is paper obtained after cellulose pulp is physically processed, such as kraft paper and parchment. The preparation method of the biodegradable paper-plastic composite structure comprises the following steps: compoundinga cellulose acetate film through a heating and pressurizing method, or compounding through a solution coating method, namely coating the surface of paper with a cellulose acetate solution; and evaporating a solvent to prepare a cellulose acetate-containing paper composite material. The product disclosed by the invention can be applied to the field of food or packaging, and can be naturally degraded to eliminate or reduce the problem of environmental pollution caused by packaging materials.

Description

technical field [0001] The invention belongs to the technical field of cellulose acetate application and relates to the preparation of a cellulose acetate composite film applicable to packaging. [0002] technical background [0003] Plastic films are most widely used in the packaging field. Plastic film can be used in food packaging, electrical product packaging, daily necessities packaging, clothing packaging and so on. [0004] Paper-plastic composite films are commonly used for packaging films. Paper-plastic composite packaging is a composite material made of paper as the base material and thermoplastic plastics. Paper substances have a certain thickness, shape stability and high folding resistance. Thermoplastics generally use polyethylene, polypropylene, polyvinylidene chloride, polyethylene terephthalate, etc. Generally, there are two compounding processes, one type is paper-plastic dry compounding, which uses compound emulsion type acrylic glue, which is coated on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B29/00B32B23/00B32B23/06B32B37/10B32B37/06C08L1/12C08K5/134C08K5/103C08K5/06C08J5/18D21H19/34
CPCB32B29/00B32B23/00B32B23/06B32B37/10B32B37/06C08J5/18D21H19/34C08J2301/12C08K5/1345C08K5/103C08K5/06
Inventor 苏日挺孙利辉苏凯梁银春于星宋晓梅
Owner NANTONG CELLULOSE FIBERS CO LTD
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