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Preparation method for biodegradable synthetic paper

A synthetic paper, biological technology, applied in the direction of flat products, applications, household appliances, etc., can solve the problems of poor rigidity, environmental pollution, lack of rigidity, etc.

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymers used in the above two patents and other related patents are non-renewable and non-biodegradable plastics. The use of such plastics will bring some pollution to the environment due to recycling problems.
Moreover, the synthetic paper with polyethylene and polypropylene as the base resin has disadvantages such as softness, lack of firmness and the same foldability as ordinary paper due to the poor rigidity of polyethylene and polypropylene.

Method used

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  • Preparation method for biodegradable synthetic paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Mix 100 parts of polylactic acid PLA 4032D with 1.25 parts of antioxidant 1330 and 0.5 parts of lubricant zinc stearate additive in a high-speed mixer; in the WP40 twin-screw extruder, add the above-mentioned mixture to the main feed In the feeder, 100 parts of heavy calcium carbonate GCC is added from the side feeding feeder of the extruder, and the material is melted and mixed uniformly by the screw, extruded and granulated, and dried. During the processing, the temperature of the screw is kept between 170-200° C., and the rotational speed of the screw is controlled between 200-350 rpm.

[0056] The extruded and dried material was cast into a casting film with a thickness of 800 μm in a casting machine (Shantou Guanghua Machinery Industry Co., Ltd.). The temperature of cylinder zone 2, zone 3, zone 4, ring network zone and diversion zone is 180°C, 170°C, 170°C, 170°C, 170°C respectively, and the temperature of die head zone 1 and die head zone 2 is 160°C, 160°C It ca...

Embodiment 2

[0058] Mix 100 parts of polylactic acid PLA 4032D with 1.25 parts of antioxidant 1330 and 0.5 parts of lubricant zinc stearate in a high-speed mixer. In the WP40 twin-screw extruder, add the above-mentioned mixture into the main feeder , 70 parts of heavy calcium carbonate GCC is added from the side feeding feeder of the extruder, and the material is melted and mixed uniformly by the screw, extruded and granulated, and dried. During the processing, the temperature of the screw is kept between 170-200° C., and the rotational speed of the screw is controlled between 200-350 rpm.

[0059] The extruded and dried material is cast into a casting film with a thickness of 1200 μm in the casting machine. Zone, ring network zone, diversion zone temperature are 180°C, 170°C, 170°C, 170°C, 170°C respectively, when the temperature of the first zone of the die head and the second zone of the die head is 160°C, 160°C, the film can be casted smoothly . The cast sheet is stretched 4 times lo...

Embodiment 3

[0061] The cast sheet obtained in Example 2 was stretched simultaneously in a biaxial stretching machine. During synchronous stretching, the stretching temperature is 85°C, and when the longitudinal stretching ratio is 4 times and the transverse stretching ratio is 4 times, there is no film breakage, and the formed stretched film has high whiteness and opacity. A high-quality synthetic paper with a thickness of 91 μm was obtained.

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Abstract

The invention relates to a preparation method for biodegradable synthetic paper. The biodegradable synthetic paper comprises the following raw materials in parts by weight: 100 parts of a polylactic resin and 70-300 parts of a functional filler. The method comprises the following steps of: (1) melting, blending, extruding and granulating: uniformly mixing components including polylactic acid except the functional filler according to a certain proportion, adding from a main feeder of a double-screw extruder, adding the functional filler into the double-screw extruder from a lateral charging feeder of the dual-screw extruder, and melting, blending, extruding and granulating with components including the polylactic acid to obtain blended particles; (2) preparing a cast sheet: fully drying the obtained particles, and extruding and casting into a membrane in a casting machine; and (3) biaxially orienting into paper: biaxially orienting the obtained membrane in a biaxial orientation machine, and annealing to obtain biodegradable synthesized paper. The obtained synthetic paper has the advantages of high whiteness, opacification, high stiffness and high folding performance.

Description

technical field [0001] The invention relates to the technical field of synthetic paper, in particular to a preparation method of biodegradable synthetic paper. Background technique [0002] Since ordinary papermaking needs to consume a large amount of wood, there has always been a demand for synthetic paper to replace ordinary paper in terms of economic benefits and saving raw materials. Synthetic paper (also known as stone paper) first appeared in countries such as Japan and Germany in the 1960s and 1970s. By the 1980s, the Soviet Union had also developed synthetic paper. The earliest synthetic paper produced in my country appeared in Taiwan. [0003] The raw material of synthetic paper is mainly made of polymer mixed with a certain amount of inorganic filler and other additives. Synthetic paper has the characteristics of light specific gravity, high strength, good printability, shading, anti-ultraviolet, durable, economical and environmentally friendly. [0004] Synthe...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K13/06C08K9/06C08K3/26B29D7/01B29C55/12
Inventor 王小兰邵静波刘涛张师军赵国安徐凯李杰邹浩
Owner CHINA PETROLEUM & CHEM CORP