JPS62260853A - Phenolic resin molding material - Google Patents

Abstract

PURPOSE:To provide the title molding material which has an excellent similarity to wooden material such as tone quality, surface hardness, thermal conductivity, lightweightness, etc. and gives lacquered moldings such as dinnerware, domestic articles, etc., containing woodmeal of zelkova. CONSTITUTION:The bark of zelkova is crushed into a powder having a particle size passing through an 80-mesh sieve, thus obtaining woodmeal (B) of zelkova. A phenolic resin (A) obtd. from a phenol and formaldehyde is mixed with 30-70wt% component B and optionally 5-15pts.wt. (per 100pts.wt. component A) curing agent (e.g., hexamine), an inorg. filler, a parting agent, a colorant, etc. The mixture is kneaded, crushed and optionally granulated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a phenolic resin molding material for lacquerware used in tableware, kitchen appliance parts, household goods, miscellaneous goods, and the like.

[Background technology]

Conventionally, I was used for tableware, E-room appliance parts, household goods, miscellaneous goods, etc.
ηA's lacquerware molding materials are made to resemble lacquerware by applying a coating to the surface of the molded product, and emphasis is placed on providing a wood-like feel in terms of sound quality, surface hardness, thermal conductivity, lightness, etc. A phenolic resin molding material containing cedar wood powder was used, but the wood texture was insufficient.

[Purpose of the invention]

An object of the present invention is to provide a molding material for lacquerware that has a woody feel.

[Disclosure of the invention]

The present invention is a phenolic resin characterized by containing tlI wood flour, which can improve the wood texture of Sound S1, such as surface agility, thermal conductivity, and lightness.The details of the present invention are as follows. Explain.

The Kamo wood powder used in the present invention is obtained by crushing the cypress wood, and preferably contains 30 to 70 weight of the total amount, or 1% (hereinafter referred to as Michi ni regret) of the total amount. In other words, if the wood is less than 30 inches, it will give a sufficient wood texture.
This is because moldability tends to decrease when it exceeds 70%. The radius π of the wood flour is preferably q2, which is equivalent to 80 Mevsie sieves. That is, if the particle size remains on the 80 mesh sieve, the appearance of the molded product tends to deteriorate and the commercial value after coating tends to decrease. In addition, it is preferable that the stick wood flour is one obtained by pulverizing only the bark of the tree, since this can further improve the wood texture. Regarding phenolic resins, novolak type resins are obtained by blending phenols such as phenol, cresol, xylenol, etc. alone or in mixtures with formaldehydes such as formalin and paraformaldehyde in a predetermined molar ratio, and reacting them under an acidic catalyst. Phenol resins, resol-type phenol resins obtained by reaction under a flukaline catalyst, or phenol resins modified with a-density, lignin, naphthalene, xylene, or petroleum-based aromatic hydrocarbons can be used. In addition, nopolaric type phenol 4
When using resin, 5 to 15 parts of hexamine is added as a hardening agent per 10 parts by weight of the resin (hereinafter referred to as "parts"). In addition to the phenol resin, curing agent, and keyaki wood, inorganic fillers, molding agents, coloring agents, etc. may be added as needed, mixed, kneaded, pulverized, and then granulated (if necessary). A molded product for lacquerware is obtained by heating and press-molding the phenol resin molding material by any means such as pressure wire molding, transformer molding, injection molding, or extrusion molding.

The present invention will be explained below based on examples). A.

Examples 1 to 3 and conventional product Phenol 1 mol% 4cyk-simaldehyde 0.8
After adding 6 mol of 37% formalin, it was reacted in an acidic precipitate with hydrochloric acid, and then dehydrated and boiled down to obtain a novolak type phenolic resin with a melting point of 90°C. A phenol resin molding material was obtained by mixing, kneading, and pulverizing, and the phenol resin molding material was compression molded at a molding pressure of '50 at 9/cds tso° C. for 3 minutes to obtain a molded product for lacquerware.

Table 1 [Effects of the Invention] Examples 1 to 3 and the conventional; As is clear from Table 2, the performance of the lacquerware fd molded products of 4qj is good, and the properties of the present invention are excellent. It was confirmed.

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Claims (3)

[Claims] (1) A phenolic resin molding material characterized by containing zelkova wood powder. (2) The phenolic resin molding material according to claim 1, wherein the amount of zelkova wood powder is 30 to 70% by weight of the total amount. (3) The phenolic resin molding material according to claims 1 and 2, wherein the zelkova wood powder is zelkova bark powder.