Composite material of pulp molding product and plastic and preparation method thereof

A pulp molding and composite material technology, applied in the field of packaging products, can solve the problems of not involving composite materials and products, infeasibility, etc., and achieve the effect of increasing the application range and added value, improving barrier properties, and good printing performance.

Inactive Publication Date: 2013-03-27
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, because pulp molding is a product of three-dimensional papermaking technology, it has the characteristics of three-dimensional size, but it is not feasible to use the current method of combining paperboard and plastic to match pulp molding and plastic
At present, pulp molding products do not involve compounding with plastics to form composite materials and products, preparation methods and applications of pulp molding and plastics

Method used

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  • Composite material of pulp molding product and plastic and preparation method thereof
  • Composite material of pulp molding product and plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Dilute the bleached coniferous wood pulp fiber with tap water to a mass concentration of 1%, dehydrate it on a pulp molding machine for 30 seconds, and mold the pulp with a moisture content of 55% in a semi-wet state, and then dry it , hot-pressing and shaping, and the pulp molding with a dryness of 92% and a thickness of 3mm is obtained.

[0036] (2) Using high-density polyethylene as raw material, extrude polyethylene plastic with a thickness of 0.15mm on an extruder.

[0037] (3) On the thermoforming machine, the high-density polyethylene plastic film is placed on the lower mold of the thermoforming machine for heating. After the plastic is heated and softened, the upper mold embedded with pulp molded products is moved down, and it is tightly connected to the lower mold. After pressing for 3-5 seconds, cool down to obtain composite materials and products of pulp molding and high-density polyethylene plastics. The obtained composite material and product of pulp m...

Embodiment 2

[0039](1) 70% bleached hardwood pulp and 30% bleached softwood pulp are used as raw materials, diluted with tap water to a mass concentration of 1.2%, dehydrated on a pulp molding machine, dehydration time is 25 seconds, and the molding moisture content is 57% , and then dried and hot-pressed to obtain a molded pulp product with a dryness of 95% and a thickness of 2 mm.

[0040] (2) Using polypropylene as raw material, extrude polypropylene plastic with a thickness of 0.25mm on an extruder.

[0041] (3) On the thermoforming machine, the polypropylene plastic film is placed on the lower mold of the thermoforming machine for heating. After the plastic is heated and softened, the upper mold embedded with pulp molded products is moved down and pressed against the lower mold for 3 - Cool after 5 seconds to obtain composite materials and products of pulp molding and polypropylene plastic. The obtained composite material and product of pulp molding and polypropylene plastic have a t...

Embodiment 3

[0044] (1) Use 70% bleached wheat straw pulp and 30% softwood pulp as raw materials, dilute it with tap water to a mass concentration of 1.0%, dehydrate it on a pulp molding machine for 30 seconds, and mold with a moisture content of 58%. Drying, heat-pressing and shaping, obtain the pulp molded product of dryness 95%, thickness 3mm.

[0045] (2) Using polypropylene as raw material, extrude polypropylene plastic with a thickness of 0.15mm on an extruder or a polyethylene terephthalate sheet with a thickness of 0.15mm purchased from the market.

[0046] (3) On the thermoforming machine, the polypropylene plastic film is placed on the lower mold of the thermoforming machine for heating. After the polypropylene plastic is heated and softened, the upper mold embedded with pulp molded products is moved down, and it is tightly connected to the lower mold. After pressing for 3-5 seconds, cool down to obtain composite materials and products of pulp molding and polypropylene plastic. ...

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Abstract

The invention discloses a composite material of pulp molding product and plastic and a preparation method thereof, and belongs to the technical field of packaging products. The composite material of pulp molding product and plastic at least comprises a pulp molding layer and a plastic layer which is composited with the pulp molding layer, wherein the plastic layer is used as an inner layer, and the pulp molding layer is used as an outer layer; a plastic thermal forming process is adopted in preparation, wherein on a thermoforming machine, a plastic film or a sheet material is placed on an upper module or a lower module of the thermoforming machine to heat, and the plastic is heated to be softened; then, the lower module or the upper module embedded with the pulp molding product is compressed with the plastic, and the plastic and the pulp molding product are composited together; and finally, the upper and lower modules are cooled so as to form the composite material of the pulp molding product and plastic, and the composite material has the same shape as the pulp molding product. The composite material of pulp molding product and plastic and the preparation method provided by the invention improves the obstruction performance of the pulp molding products, and the leakage of the internally packaged liquid products cannot destroy the external package and cannot pollute the environment.

Description

technical field [0001] The invention relates to a composite material based on a pulp molded product and a preparation method, in particular to a composite material and a preparation method of a pulp molded product and plastic, and belongs to the technical field of packaging products. Background technique [0002] Corrugated cardboard and corrugated boxes are commonly used cushioning packaging materials and packaging products, and are widely used in the outer packaging of liquid products such as fruits, beverages, alcohol, and dairy products, and in the protective packaging of other products. As environmental protection becomes more and more popular and the environment deteriorates, the development and application of renewable resources for product packaging and pulp molded products has received extensive attention, and replaced some corrugated cardboard and corrugated boxes for beverages and dairy products The outer packaging of liquid products such as alcohol and high-end a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/10B32B37/06B32B37/10B29C47/00B65D65/40
Inventor 刘全校许文才李东立付亚波
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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