Water vapor barrier biodegradable polymer film as well as preparation and application thereof

A technology of polymer film and degradable polymer, applied in application, biological packaging, flexible covering, etc., can solve the problem of unclear influence of water vapor barrier properties of biodegradable polymer film, and the improvement effect of mechanical properties needs to be further strengthened. It is difficult to use the biaxial stretching process to achieve the effect of improving the water vapor barrier ability and mechanical properties, improving the water vapor barrier ability and excellent mechanical properties

Active Publication Date: 2020-06-05
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biaxial stretching process has high requirements on the uniformity and material toughness of the polymer film, such as carbon dioxide-propylene oxide copolymer, it is difficult to use the biaxial stretching process, and most biodegradable polymer films can be biaxially stretched also unclear
On the other hand, the use of electron beam irradiation technology can improve the mechanical properties of polyadipate / butylene terephthalate film such as tensile strength and elongation at break, and make up for the thinning of biodegradable polymer films. However, the improvement effect of mechanical properties still needs to be further strengthened, and the effect of post-treatment of electron beam irradiation on the water vapor barrier properties of biodegradable polymer films in the prior art is not clear

Method used

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  • Water vapor barrier biodegradable polymer film as well as preparation and application thereof
  • Water vapor barrier biodegradable polymer film as well as preparation and application thereof
  • Water vapor barrier biodegradable polymer film as well as preparation and application thereof

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preparation example Construction

[0036] The preparation method of the water vapor barrier biodegradable polymer film in the present invention comprises the following steps:

[0037] (1) Blending biodegradable polymers, crosslinking agents, and processing aids (such as blocking agents, titanium dioxide, calcium carbonate, etc.) to obtain special materials for biodegradable polymer films. The biodegradable polymer is polyadipate / terephthalate-butylene glycol ester or a blend of polyadipate / terephthalate-butylene glycol ester and other degradable polymers, and the other The degradable polymer is one of polylactic acid, thermoplastic starch, carbon dioxide-propylene oxide copolymer, polybutylene succinate, polycaprolactone, and polyhydroxybutyrate. The special material for biodegradable polymer film may or may not contain processing aids. Described linking agent is the one in triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, so The added amount of the...

Embodiment 1

[0054] Several water vapor barrier biodegradable polymer films were prepared according to the following steps:

[0055] (1) Dry poly(adipic acid / terephthalic acid-butylene glycol) in a blast drying oven at 50-80°C for 12-24 hours, and then cool to room temperature with cold air. Dry polyadipate / terephthalate-butylene glycol ester resin and triallyl isocyanurate (consumption is 2wt% of polyadipate / terephthalate-butylene glycol ester) in Banburying and blending in the internal mixer, the banburying temperature is 130°C, and the banburying time is 13min, to obtain the special material for biodegradable polymer film.

[0056] (2) The biodegradable polymer film special material obtained in the step (1) is hot-pressed into a 0.2mm thick biodegradable polymer film by a flat vulcanizing machine.

[0057] (3) The biodegradable polymer thick film obtained in step (2) is simultaneously biaxially stretched at 80° C. to obtain a bidirectionally oriented film; the stretching speed is 100 m...

Embodiment 2

[0063] Several water vapor barrier biodegradable polymer films were prepared according to the following steps:

[0064] (1) Dry poly(adipic acid / terephthalic acid-butylene glycol) in a blast drying oven at 50-80°C for 12-24 hours, and then cool to room temperature with cold air. Dry polyadipate / terephthalate-butylene glycol ester resin and triallyl isocyanurate (consumption is 2wt% of polyadipate / terephthalate-butylene glycol ester) in Banburying and blending in the internal mixer, the banburying temperature is 130°C, and the banburying time is 13min, to obtain the special material for biodegradable polymer film.

[0065] (2) The biodegradable polymer film special material obtained in the step (1) is hot-pressed into a 0.2mm thick biodegradable polymer film by a flat vulcanizing machine.

[0066] (3) The biodegradable polymer thick film obtained in step (2) is simultaneously biaxially stretched at 80° C. to obtain a bidirectionally oriented film; the stretching speed is 100 m...

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Abstract

The invention belongs to the field of biodegradable materials. The invention discloses a water vapor barrier biodegradable polymer film as well as preparation and application thereof. The preparationmethod comprises the following steps: blending the biodegradable polymer and the cross-linking agent to obtain a special material, molding the special material to form a thick film, carrying out bidirectional stretching on the thick film, and carrying out electron beam irradiation to obtain the water vapor barrier biodegradable polymer film, thereby improving the water vapor barrier property of the biodegradable polymer film. According to the invention, the overall flow process design of the preparation method is improved, wherein the biodegradable polymer film is modified by using a two-way stretching process and an electron beam irradiation technology, so that the problem of poor water vapor barrier property of the biodegradable polymer film can be effectively solved, and the biodegradable polymer film can be widely applied to the fields of agricultural mulching films, food and daily necessity packaging, electronic product packaging and the like.

Description

technical field [0001] The invention belongs to the field of biodegradable materials, and more specifically relates to a water vapor barrier biodegradable polymer film and its preparation and application. Background technique [0002] Polyadipate / terephthalate-butylene glycol ester and its blends with other biodegradable polymers are fully biodegradable, have good mechanical properties and processing properties, and can be widely used in agricultural mulch films and packaging film. However, the water vapor transmission rate of polyadipate / butylene terephthalate and its biodegradable blend film is higher, and the water vapor transmission rate of pure polyadipate / terephthalate-butylene film The permeation amount is more than twice that of polyethylene film of the same thickness, and its production cost is 2 to 3 times that of polyethylene film of the same thickness, which greatly limits the use of polyadipate / terephthalate-butylene glycol and its Popularization and applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J7/12C08F283/02A01G13/02B65D65/46C08L67/02
CPCA01G13/0275B65D65/466C08F283/02C08J5/18C08J7/123C08J2367/02Y02W90/10Y02A40/28Y02A40/90
Inventor 周兴平曹志文王勇赵茂吉解孝林
Owner HUAZHONG UNIV OF SCI & TECH
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