Low-permeability TPU film for automobile headrest and preparation method of low-permeability TPU film

Abstract

The invention provides a low-permeability TPU film for an automobile headrest and a preparation method of the low-permeability TPU film. The low-permeability TPU film for the automobile headrest comprises a TPU film layer and a water vapor barrier layer which are laminated, wherein the water vapor barrier layer comprises layered silicate minerals and synthetic resin; and the TPU film layer is prepared from the following components in parts by weight: 10-20 parts of polyether polyol, 60-80 parts of aliphatic diisocyanate, 10-20 parts of an acrylic acid derivative, 1-4 parts of a catalyst and 1-5 parts of a chain extender. On the premise that the TPU film for the automobile headrest has good mechanical performance, the TPU film for the automobile headrest further has low water vapor permeability and oxygen permeability; and the preparation method of the TPU film for the automobile headrest is simple, raw materials are easy to obtain, the price is low, and the implementation is convenient.

Description

technical field [0001] The invention belongs to the field of films, and in particular relates to a low-permeability TPU film for automobile headrests and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a kind of heat-plasticized and soluble polyurethane material, which has a unique structure of soft and hard block copolymers. It is widely used because it has both the elasticity of rubber and the processability of plastic It is used in many fields, such as: exterior parts of automobile body, cable sheath, adhesive tape, ski boots, gear, rubber hose, clothing fabric, inflatable products, etc. [0003] However, the barrier properties of TPU films to oxygen and other small molecules are not good. Improving the barrier properties of TPU films simply by adding fillers will lead to a decrease in mechanical properties. Therefore, how to obtain excellent barrier properties and high mechanical strength through modification Com...

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Problems solved by technology

[0003] However, the barrier properties of TPU films to oxygen and other small molecules are not good, and simply adding fillers to improve the barrier properties of TPU films will lead to a decline in mechanical properties, so How to obtain composite materials with excellent barrier properties and high mechanical strength through modification is the research focus

[0004] CN106883565A discloses a high-barrier composite film, including three composite structural layers of an outer layer, a barrier layer and an inner layer, and the coating includes the following percentages of Components: PA 75-80%, nano-silica sol 20-25%, the barrier layer is made of the following components: PET 30-60%, PEN8-18%, nano-modified montmorillonite soil 30-60%, the inner layer is made of the following components: PE30-60%, PP 30-55%, nucleating agent 24%, compatibilizer 5-15%, the composite film has Good barrier performance, but its barrier performance still needs to be improved

In the present invention, the carbon nanofibers modified by the food preservative are mixed into the TPU film, and the carbon nanofibers and the preservatives produce a synergistic antibacterial effect, delaying food deterioration, and the carbon nanofibers are dispersed in the TPU film to form an interwoven network structure, increasing the The hydrophobicity of the TPU film and the barrier effect on water vapor and oxygen, but its barrier performance still needs to be improved

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