KR20100101232A - The plastic form - Google Patents

Abstract

PURPOSE: A molded product of a synthetic resin foam bead, and a manufacturing method thereof are provided to protect the surface of a bead particle by coating the surface with a binder, and to improve the coherence force between bead particles. CONSTITUTION: A manufacturing method of a molded product of a synthetic resin foam bead comprises the following steps; forming a mixed material by mixing a synthetic resin foamed bead and more than one binder selected form the group of organic binders; filling the mixed material to a mold, and sealing; and heat-molding the material.

Description

High strength synthetic resin foam beads moldings {TH PLASTIC FORM}

The present invention relates to a synthetic resin foam beads molded article, more specifically, a synthetic resin foam beads molded article prepared by injecting and heating the synthetic resin foam beads, which is a synthetic resin foam body of a particle shape (BEAD STYLE) into a mold to expand and fuse the particles to integrate. It is about.

As a manufacturing method of a molded article using a conventional synthetic resin foam beads

By using the prepared synthetic resin foam beads as a sole raw material and filling and heating the molded article of the shape to be prepared, the synthetic resin foam beads filled in the mold are expanded and the surface is melted to cause fusion between the expanded synthetic resin foam beads. Thus, a method for producing a molded article of a desired shape has been used.

However, ordinary synthetic resin foam beads are 10 to 60 times higher foaming foams, which are excellent in cost reduction, ultra-light weight, impact resistance, soundproofing, and thermal insulation due to high foaming, but are manufactured through the conventional manufacturing method because the strength of the particles is very weak. In the case of the molded article, the bonding strength between the particles is reduced after molding and the surface is easily broken by friction.

In order to solve the above disadvantages, the present invention is made by adding a synthetic resin foam beads beads to the raw material of the conventional synthetic resin foam beads alone as an additional raw material and by using the mixed raw materials prepared through the molding material To improve the durability of the.

Accordingly, the present invention for achieving the above object

A high strength produced by preparing a mixed raw material of the synthetic resin foam beads and a binder by filling the mold of the shape to be prepared by mixing the resin and foamed by heating it by putting at least one binder selected from the group of the organic binder into the synthetic resin foam beads It provides a synthetic resin foam beads moldings.

The high-strength synthetic resin foam beads molded article prepared according to the present invention is a high-strength synthetic resin foam beads molded article having improved durability by coating the binder as a mixed raw material on the surface of the beads particles to protect the surface of the particles and increase the bonding strength between the particles when fusion between the particles There is an effect to provide.

The present invention is prepared by preparing a mixed raw material of the synthetic resin foam beads and the binder mixed with at least one binder selected from the group of synthetic resin foam beads and organic binder and filling the mold of the shape to prepare the mixed raw material and heat-molding it It provides a high-strength synthetic resin foam beads molding prepared.

The high strength synthetic resin foam beads molded according to the present invention has an improved durability by coating a binder, which is an additional raw material of the present invention, on the surface of the bead particles to protect the surface of the particles and to increase the bonding strength between the particles when the particles are fused. It is possible to provide a high strength synthetic resin foam beads moldings.

Below,

In order to help the understanding of the configuration of the present invention will be described briefly in connection with the present invention will be briefly described in the general method of manufacturing the general formula of the synthetic resin foam beads and the polymerization method.

However, the method and configuration of the synthetic resin foam beads to be described below are posted to explain the configuration of the present invention more easily understood that the present invention is not intended to disclose the technology related to the method for producing the synthetic resin foam beads. In addition to the well-known facts, synthetic resin foam beads used as a raw material of the present invention can be prepared through a variety of manufacturing methods that are not published below, synthetic resin foam beads prepared through a variety of such unpublished manufacturing method is also high strength of the present invention It will be appreciated that it can be a raw material for the production of synthetic resin foam beads moldings.

Synthetic resin foam beads by the polymerized production method typically includes eps beads,

This is produced by injecting foaming gas into PS and polymerizing it in water in the process of polymerizing styrene as polystyrene (PS), and then collecting and drying it in a foaming reactor (Autoclave). It is.

These eps beads are synthetic resin foams of the present invention as they exhibit poor physical properties such as resource-saving materials, which have 98% of the volume, and the remaining 2% of the resin, and the disadvantages of brittleness and non-solvent resistance (toluene, MEK, etc.). It is unreasonable to use as a raw material for bead molding, and it is more preferable to be used through improvement of such weak physical properties.

Synthetic resin foam beads by a badge manufacturing method typically includes epp beads,

First of all, in consideration of the size of the final foam, PP (polypropylene) resin is introduced into the extruder and linearly extruded to cut it into mini particles, and the cut particles are blown into a foaming reactor.

(Autoclave) was prepared by the method of foaming by injection and blowing agent (butane, CO2 gas, etc.).

At this time, the desired foaming ratio can be obtained by adjusting the foaming temperature, gas, and pressure.

By adjusting the foaming ratio can be prepared by increasing the elasticity to suit the environment and use.

The produced EPP beads have better heat resistance and cold resistance than EPS and EPE, less deformation due to temperature, strong adhesion, excellent rigidity, excellent (repeated) impact absorption and excellent restoring force, oil resistance and chemical resistance. Excellent flame retardant level of UL flame retardant standard,

In particular, it does not generate toxic gas (dioxin, etc.) when incinerated, and it is chemically stable, so it can be used as a packaging container for food, and since there is no crumb like EPS, it can maintain cleanliness. Therefore, it can be a very desirable material for use of the shock absorbing material and interior material to be provided by the present invention.

In the above, the manufacturing method and the physical properties of the general purpose synthetic resin foam beads in order to help the understanding of the present invention has been described.

Hereinafter, the detailed structure of this invention is shown as a pro chart.

<Manufacturing process of high strength synthetic resin foam beads>

A) Preparation of mixed raw materials (mixing synthetic resin foam beads and binder)

                           ↓

B) Filling the mixed raw material into the mold

                           ↓

C) heating molding

                           ↓

D) demolding

                           ↓

hemp)

Completed manufacturing high strength synthetic resin foam beads

The process will be described in detail step by step.

A) Preparation of mixed raw materials (mixing synthetic resin foam beads and binder)

As a process of mixing the prepared synthetic resin foam beads and a binder

It is a step of preparing a mixture in which the binder coating layer is formed on the surface of the synthetic resin foam beads by mixing at least one binder selected from the group of synthetic resin foam beads and organic binder.

At this time, the binder to be used may be a binder of a single raw material selected from the group of organic or inorganic binders as described above, or may be selected from a binder of a mixed type prepared by mixing two or more raw materials, and more preferably For drying, it can be manufactured by using a self-hardening fast binder having the property of drying itself without solvent or water and using it as a mixed raw material. Examples include urethane binder, epoxy binder and other fast hard binder. It includes a fast-hard binder that is quickly cured by steam, moisture, heat.

In particular, by mixing an elastomeric resin binder, an elastic raw material containing rubber as an additional raw material, as an additional raw material to a single or mixed raw material binder selected as a manufacturing method for increasing the elasticity of the high-strength synthetic resin foam beads molding as a final result. It may also be prepared using the prepared mixing binder.

B) Filling the mixture with mold

Filling and sealing in the mold of the shape to be prepared to prepare the mixed raw material prepared through the above steps.

C) Heating Molding

By applying steam of about 140 to 150 degrees Celsius to the filled mold, the synthetic resin foam beads are further expanded in the mold to form a unitary molded body by bonding between the particles by the mixed binder.

D) demolding

The integrally molded high strength synthetic resin foam beads molded product is demolded from the molding mold.

The process of the present invention has been described above.

Meanwhile,

In order to improve the physical or chemical properties and various functionalities of the high-strength synthetic resin foam beads molding of the present invention,

By adding one or more chemical additives to the manufacturing process, other chemical properties including elasticity, restoring force, weather resistance, abrasion resistance, tensile strength, heat resistance, cold resistance, oil resistance, chemical resistance, antioxidant resistance, flame resistance, antistatic, etc. Made of reinforced high strength synthetic resin foam beads

In addition, at least one additional raw material of rubber chips, urethane chips, EPDM chips, synthetic resin chips, sponge chips, waste tire grinding chips, various functional pillars, and other oil and inorganic materials may be mixed with synthetic resin foam beads. As a result, it is possible to produce a high-strength synthetic resin foam beads molded with improved physical properties and functionality.

In addition, a high-strength synthetic resin foam beads molded article having improved aesthetics can be prepared by additionally preparing a pigment of a color to be prepared.

Example 1

EPP Foamed Beads (20x Foam) 1KG

The mixture prepared by mixing 2kg of steam-curable urethane binder is poured into a plate-shaped mold having a width of 1M length and 1M thickness 3CM, and the urethane binder is expanded at the same time as the foam beads are expanded by injecting steam of about 140 ° C and heating for 2-3 minutes. By hardening, a plate-like high strength synthetic resin foam beads molded product was prepared.

Example 2

EPP Foamed Beads (20x Foam) 1KG

Steam Curing Type Urethane Binder 2KG

The mixture prepared by mixing 600G Samsan antimony (flame retardant) is poured into a plate-shaped mold having a width of 1M length and 1M thickness 3CM, injecting about 140 ° C steam and heating for 2-3 minutes to expand the foam beads and urethane binder By hardening, a plate-shaped high strength synthetic resin foam beads molded product having flame retardancy was prepared.

Example 3

EPP, EPS Foam Beads (20 ~ 30x Foam) 1KG

Steam Curing Urethane Binder or Water Curing Urethane Binder 2KG

It was prepared as a raw material, admixed with a binder immediately after adsorbing moisture to the foam beads, to prepare a mixture, and filled the prepared mixture in a molding mold at room temperature and atmospheric pressure of about 25 ~ 30 ° C and 30 minutes to 1 hour Synthetic resin foamed beads molded product was prepared by curing the mixture with time.

In the above, the structure of this invention was demonstrated in detail.

Claims (4)

A high-strength synthetic resin foam beads molded by manufacturing a mixed raw material by mixing at least one binder selected from the group of synthetic resin foam beads and an organic binder and filling and sealing the mold of the shape to prepare the mixed raw material prepared by heating and molding them. A high-strength synthetic resin foam beads molding, characterized in that the mixed material produced by mixing the EPP foam beads and steam-curable urethane binder is filled and sealed in a molding mold and molded by injecting and heating steam of about 140 degrees Celsius into the mold. In order to improve the physical properties of the high-strength synthetic resin foam beads molded article of claim 1 or 2 characterized in that the high-strength, characterized in that by manufacturing the foam beads in which at least one physical admixture or chemical additive is further added to the beads manufacturing chip manufacturing process Synthetic resin foam beads moldings. The method of claim 3 Physical admixtures or chemical additives include rubber chips, urethane chips, EPDM chips, synthetic resin chips, sponge chips, waste tire chips, various functional fillers and other admixtures and elasticity, restoring force, weather resistance, wear resistance, tensile strength, heat resistance, cold resistance, oil resistance, High strength synthetic resin foam beads, characterized in that the addition and molding of one or more of the raw materials selected from the above as an additional raw material including pigments and enhancers for improving chemical resistance, antioxidant resistance, flame retardancy, antistatic and other chemical properties Moldings.