WO2001094456A1

WO2001094456A1 - Foamed article comprising used governmental post card as main component and method for producing the same

Info

Publication number: WO2001094456A1
Application number: PCT/JP2001/004860
Authority: WO
Inventors: Yu Gotoh; Masakazu Yokono; Hiroyuki Kiryu; Syouji Kurotsu
Original assignee: Tokiwa Printing Inc.
Priority date: 2000-06-09
Filing date: 2001-06-08
Publication date: 2001-12-13
Also published as: AU2001262724A1; JP3326156B2; JP2001354795A

Abstract

A foamed article which comprises 10 to 40 wt % of a paper powder component made from used governmental post cards as a main component, 25 to 40 wt % of a starch component as an auxiliary agent, and 35 to 50 wt % of polypropylene resin component. The foamed article can be used for producing a shock absorbing material and a thermal insulating material exhibits a significantly greater restoring force and is significantly more flexible as compared to a conventional foamed article using general used paper, and is friendly to the environment due to the use of a non-aromatic resin.

Description

Specification

TECHNICAL FIELD The present invention relates to a foam mainly composed of used postcards and a method for producing the same.

TECHNICAL FIELD The present invention relates to a foam mainly composed of a postcard made of government-made postcard, which is mainly composed of a paper powder component of a postcard made of government-made postcard, and is capable of providing a resilient and flexible foam. Background art

Traditionally, government-made postcards were generally used as recycled paper. In this specification, the official postcard waste paper refers to waste paper such as cutting waste and stained paper generated in the production process of the official postcard, and stained paper generated in the home where the user is used.

As mentioned above, this is a government-made postcard used as recycled paper, but its paper fiber quality is better than that of general waste paper. There is a need to make effective use of this to produce high-quality foams and obtain natural environment-friendly cushioning materials and thermal insulation materials that can replace conventional foamed styrene. Disclosure of the invention

In the present invention, a 1 0-4 0% by weight of the paper powder component of postcard paper, and 2 5-4 0 weight ^_0/0 starch components as adjuvants, 3 5 to 5 0 wt ^_0/0 Polypropylene By using a foam made mainly of postcard waste paper made of a resin component as a main component, this foam can be used effectively as a cushioning material and a heat insulating material.First, a cushioning material or a heat insulating material as a foam. The material can be made much better than conventional materials, and the third effect is that it can be used as a pollution-absorbing cushioning material and heat insulating material.

In particular, in the present invention, a flexible foam having more resilience than conventional foams of vegetable material can be produced by using a combination of high-quality vegetable fiber and starch of government-made postcards. .

Such a resilient, flexible foam has the advantage that it can be effectively used as a cushioning material during transportation and as a heat insulating material as a building material. For this reason, government-made postcards Recovered paper is used only for ordinary recycled paper, while the present invention can be used much more effectively.

In addition, the polypropylene resin component contained in the foam is a chain hydrocarbon polymer having no benzene ring. After combustion, it is mainly composed of carbon dioxide and water vapor, and the calorific value of combustion is smaller than that of expanded polystyrene.

Therefore, since it can be burnt and disposed together with general household waste, it has a good effect in terms of global environmental protection.

In the present invention, a 1 0-4 0 weight ^_0/0 of paper powder component of postcard paper, and 2 5-4 0 weight ^_0/0 starch components as adjuvants, 3 5 to 5 0 wt ⁰ / ₀ is a foam mainly composed of an official postcard wastepaper composed of a polypropylene resin component, and the foam is a foam mainly composed of an official postcard wastepaper that is a cocoon-shaped foam having an appropriate length. This has the advantage that it can be effectively used especially as a cushioning material during transportation and as a heat insulating material as a building material.

Further, in the present invention, a 1 0-4 0 weight ^_0/0 of paper powder component of postcard paper, and 2 5-4 0% by weight of the starch component as an adjuvant, 3 5 to 5 0 wt% of Poripuropi By using a foam mainly composed of an official postcard waste paper composed of a ren resin component as a main component, and using the foam as a main component, an official postcard waste paper formed of a plate-like, square material or sheet-like foam, In particular, it has the advantage that it can be effectively used as a heat insulating material as a building material.

In the present invention, the 1 0-4 0 weight ^_0/0 of postcard paper and paper powder component, by mixing 2 5-4 0 weight ^_0/0 starch component as an adjunct to the paper powder component, the then 3 5-5 0 polypropylene resin component having a weight ^_0/0 by high-temperature heating, and adding water and kneaded, mainly postcard paper to produce a foam from the extrusion die suitably by introducing them into the extruder By adopting the method for producing a foam as a component, a foam mainly composed of government-made postcard waste paper can be particularly effectively used as a cushioning material or a heat insulating material.

Further, in the present invention, the 1 0-4 0 weight ^_0/0 of postcard paper and paper powder component, by mixing 2 5-4 0 weight ^_0/0 starch component as an adjunct to the paper powder component , then 3 5 - 5 0 wt ^_0/0 polypropylene resin component high temperature heating, and kneaded by adding water Then, in a method for producing a foam mainly composed of postcard waste paper made by feeding these into an extruder and producing a foam from an appropriate extrusion die, the extrusion die is formed into a hole having a diameter of about 2 cm. By adopting a method of manufacturing a foam mainly composed of government-made postcard waste paper, which is cut into appropriate lengths and manufactured as a cocoon-shaped foam, the foam is converted into a cocoon-shaped, so-called rose-shaped foam. It can be easily manufactured. In particular, as shown in Fig. 4, the conventional foam a mainly composed of high-quality paper uses vegetable fibers, but it is not of high quality, so it has a poor swelling state and poor resilience. However, in the present invention, it can be produced as a resilient, flexible foam in a foamed state. In other words, as shown in Fig. 3, the cocoon is cocoon-shaped, the surface bulges like a drum, the surface is formed lustrous, and it is taut and has high restoring force. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a process diagram of the manufacturing method of the present invention, Fig. 1 is a side view of a main part of an extruder, Fig. 3 is an enlarged side view of a cocoon-shaped foam of the present invention, and Fig. 4 is a conventional product mainly made of high quality paper. It is an expanded side view of the foam of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described with reference to the drawings.

The foam of the present invention, a paper powder component of postcard paper of about 1 0-4 0 weight ^_0/0, and about 2 5-4 0 weight ^_0/0 starch (corn starch) component as an auxiliary agent, about It is composed of a 3 5-5 0 weight ^_0/0 of the polypropylene resin component. Further, an increase or decrease of about 10% of each component is included in the present invention.

The official postcard waste paper is first coarsely crushed (crushed) by a mixer-cut mill, and then finely pulverized by a mill (mill) mill, and collected as powder by a dust collector. The paper powder component as such a paper powder is kneaded with the starch component using a kneader, heated and melted together with the polypropylene resin component, and extruded using a shaft extruder A using water as a foaming medium. Thus, a foam is produced.

It is preferable that the official postcard waste paper is pulverized into a powder (about 150 to 80 im particle size) that has passed through a sieve of 100 to 200 mesh. Ratio of foam raw material composition of the present invention, the proportion of the polypropylene resin component to the total is 5 0 weight ^_0/0 approximately, thereby obtaining a foam. From the viewpoint of effective utilization of postcard paper, the ratio of the polypropylene resin component as 5 0 wt ^_0/0 hereinafter, the composition ratio of postcard paper 1 0 weight ^_0/0 or more, and as much child is desired.

Next, a method for producing a foam mainly composed of government-made postcards will be described. First, waste paper of government-made postcards is coarsely crushed by a mixer-cut crusher and crushed into fragments of about 15 to 20 wakes. Then, it is finely pulverized with a mill-type pulverizer to obtain a paper powder component of a postcard made of official postcards of about 200 mesh. Next, the finely ground paper powder component of the official postcard waste paper and a starch component, which is an appropriate industrial starch, are mixed. Then, a polypropylene resin component (granules) and water are mixed with the paper powder component and the starch component, followed by heating and kneading. By extruding such components from an extruder A as a high-temperature heating cylinder, a foam can be produced.

The combination of the extrusion diameter of the extruder A and the extrusion die 4 (the die) makes the cocoon-shaped

(Rose-shaped), plate-shaped or sheet-shaped cushioning materials and heat insulating materials for buildings can be manufactured. More specifically, a cocoon-shaped foam can be manufactured by extruding the extrusion die 4 (the die) from a diameter of several mm and cutting it at an appropriate length of several cm. Further, by forming the extrusion die 4 (the die) in a flat shape, a plate-like foam can be manufactured. Furthermore, by forming a very thin plate in a wide shape, a foam as a sheet-like cushioning material or a heat insulating material for buildings can be manufactured. Even if the proportion of the polypropylene resin component is 50% by weight or more, it is possible to obtain substantially the same foam as described above.

Experimental example

Specific manufacturing steps will be described with reference to the flowchart of FIG. First, the government-made postcard waste paper is roughly crushed into pieces of about 15 to 2 O ram using a mixer katsu Yuichi type mill.

(See S1). The coarsely pulverized paper fragments are finely pulverized by a mill-type pulverizer (see S2). This fine powder was sucked in air from the top of the pulverizer with a 1.2 kW suction pump while adjusting the suction opening scale, and passed through a 100-200 mesh sieve. Collected as paper powder (approximately 150-80 m particle size). The process up to this point was to use government-made postcards as paper powder components. The paper powder component and the starch component, which is an industrially modified starch, are added and mixed at a weight ratio of 1: 1 (see S3). Then, such paper powder component and a paper powder mixture 5 0 wt ^_0/0 of the starch component, a polypropylene resin component 5 0 wt ^_0/0, keep well kneaded with a kneading machine suitably supplying water (See S4). The paper powder component, the starch component, and the polypropylene resin component are put into the extruder A (see S5).

Then, using an extruder A (see FIG. 2) of the two axes, said paper powder kneaded substance 5 0 wt%, suitably supplies the polypropylene resin 5 0 wt ^_0/0 and water, such as: mechanical By setting the processing conditions, a high-quality cocoon-like (rose-like) foam was produced.

Cylinder 1 (C 1) 80 ° C

Cylinder 2 (C 2) 1 2 0. C

Cylinder 3 (C 3) 1 3 0 ° C

Cylinder 4 (C 4) 1 6 5 ° C

Cylinder 5 (C 5) 1 6 5 ° C

Extrusion die 1 6 5 ° C

Extrusion pressure 30 kg / cm ² (294 N / cm ² ) Raw material temperature (actual measurement) 180 to 190 ° C

Water addition scale 1 20 to 13 (approximately 18 L / h)

Paper feeder rotation speed J 2 r.p.m

P.P. feeder rotation speed 4 8 r.p.m

Twin screw extrusion screw rotation speed 280 to 300 r.p.m

In Fig. 2, 1 is an input port, 2 is a water input port, 3 is an overnight port, and 5 is an outlet.

The extrusion die 4 (base) for extruding the above foam is extruded as a circular, cord-like foam having a hole diameter of about 2 to 3 mm (see S6). Then, when cut short by a rotating cutter at the position of the extrusion die 4, a cocoon-shaped, that is, a so-called rose-shaped foam can be produced (see S7). Specifically, it is a cocoon-like foam that is foamed and has a diameter of about 2 cm and a length of about 5 era.

Although not shown, the shape of the foam to be extruded is changed to a plate shape, a square shape, or the like, depending on the combination of the shape and size of the extrusion die 4 and the composition of the raw materials. Or it can be manufactured in sheet form.

Also, in the experimental example of the foam, and 1 5 wt ^_0/0 of paper powder component of postcard paper, and 2 5 wt ^_0/0 starch component as an adjuvant, and 5 0 wt ^_0/0 polypropylene resin component Was produced. In particular, a cocoon-like foam was produced. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention is mainly composed of paper powder components of postcards made of government-made postcards, and can be used as a resilient and flexible foam. In particular, it can be burned and disposed of together with general household waste. It can be used as a good foam from the viewpoint of environmental protection.

Claims

The scope of the claims

1.1 0-4 0 weight ^_0/0 and paper powder component of postcard paper of a 2 5-4 0 weight ^_0/0 starch components as adjuvants, 3 5-5 0 weight ^_0/0 of the polypropylene resin A foam mainly composed of used postcards made of government-made postcards, characterized by being composed of components.

2.1 0-4 0 weight ^_0/0 and paper powder component of postcard paper of a 2 5-4 0 weight ^_0/0 starch components as adjuvants, 3 5 to 5 0 wt ^_0/0 of the polypropylene resin What is claimed is: 1. A foam mainly composed of an official postcard waste paper, wherein the foam is a cocoon-shaped foam having an appropriate length in the foam mainly composed of an official postcard waste paper comprising the above components.

3.1 0-4 0 weight ^_0/0 and paper powder component of postcard paper of a 2 5-4 0 weight ^_0/0 starch components as adjuvants, 3 5 to 5 0 wt ^_0/0 of the polypropylene resin A foam mainly composed of an official postcard waste paper, wherein the foam is a plate-like, square material-like or sheet-like foam comprising the following components: .

4.1 to 0-4 0 weight ^_0/0 of postcard paper and paper powder component, by mixing 2 5-4 0 weight ^_0/0 starch component as an adjunct to the paper powder component, then 3 5-5 An official postcard made of recycled paper, characterized in that a propylene resin component having a weight of ⁰ / o is heated at a high temperature, water is added and kneaded, and these are charged into an extruder to produce a foam from an appropriate extrusion die. Manufacturing method of foam as main component.

5.1 to 0-4 0 weight ^_0/0 of postcard paper and paper powder component, by mixing the starch component of 2 5-4 0 weight ⁰ / o as an adjunct to the paper powder component, then 3 5-5 In a process of heating a ⁰ wt./0/o polypropylene resin component at a high temperature, adding water and kneading the mixture, feeding them into an extruder and producing a foam from an appropriate extrusion die, the extrusion die has a diameter of about A method for producing a foam mainly composed of used postcards made of official postcards, characterized in that it is made into a 2 cm hole, cut into appropriate lengths, and produced as a cocoon-shaped foam.