CN2331693Y

CN2331693Y - Composite sandwich laminate with sisal hemp fibre resin base

Info

Publication number: CN2331693Y
Application number: CN 98234070
Authority: CN
Inventors: 杨桂成; 张茂安; 曾汉民; 李家驹; 章明秋
Original assignee: KEBAO CO Ltd GUANGZHOU CITY; National Sun Yat Sen University
Current assignee: KEBAO CO Ltd GUANGZHOU CITY; Sun Yat Sen University; National Sun Yat Sen University
Priority date: 1998-04-24
Filing date: 1998-04-24
Publication date: 1999-08-04
Anticipated expiration: 2008-04-24

Abstract

The utility model relates to a compression moulding forming sandwich board, which is provided with a core layer of the sisal fibrous resins-based composite material and a surface layer which covers the core layer. The material of the core layer can be the sisal short fibrous resins-based composite material or the sisal fibrous weaving cloth resins-based composite material. The utility model has the advantages of high strength, high modulus, shock resistance and water resistance. The complex shape products can be once moulded. The manufacturing process is simple. Because the moulding pressure needed is low, so the cheap GRP mould can be used, causing a low production cost.

Description

Sisal fiber polymer matrix composites battenboard

The utility model relates to a kind of laminate, and particularly a kind of sandwich layer is the battenboard of sisal fiber polymer matrix composites.

Existing compression molding battenboard has wood chip battenboard, bagasse battenboard etc., their core is that the compound mold pressing under High Temperature High Pressure by wood chip or bagasse and resin matrix forms, its superficial layer can be spread woodgrained paper in the surface in upper and lower mould before mold pressing, form with the sandwich layer one-step mould then, also can stick with glue agent stickup woodgrained paper on the core surface and form.These type of battenboard goods have the following disadvantages; The briquetting pressure height need to use the metal die that involves great expense, and generally can only suppress the plate product of simple shape, and because the intensity of wood chip, bagasse is low, thus its battenboard goods to hold spiral shell power lower, mechanical property is undesirable.

The purpose of this utility model is the deficiency that will overcome above-mentioned battenboard, and a kind of intensity height is provided, can once molding formed complicated shape goods, and the battenboard that production technology is simple and cost is low.

The purpose of this utility model realizes by following measure;

The utility model is the battenboard of compression molding, and it has sisal fiber polymer matrix composites sandwich layer and is coating the overlay of sandwich layer.Core material can be sisal hemp short fibre polymer matrix composites or sisal fiber woven cloth polymer matrix composites.

The sisal hemp short fibre resin-based materials of sandwich layer is to be made by sisal hemp short fibre and mixed with resin, sisal fiber woven cloth polymer matrix composites be in sisal fiber woven cloth two sided coatings with resin, and resin infiltrates in the sisal fiber woven cloth and makes.Resin can be the thermosetting unsaturated polyester resin, or thermosetting phenolic resin, or epoxy resin.Such core material briquetting pressure is low, only is about 2MPa, can be with reference to the disclosed sisal fiber polymer matrix composites of Chinese patent CN1168316A when actual fabrication.

Overlay can be structural product with colour stone effect, fiberglass, resin gel coat, wooden, papery or colloid membrane.

Compare with existing wood chip battenboard or bagasse battenboard, the advantage that the utlity model has: because the fiber of the sisal fiber raw material that uses is long, the intensity height, the modulus height, water imbibition is low, thereby prepared battenboard is a kind of high strength, high-modulus, shock-resistant, water-fast new material, complex-shaped goods can be once molding formed, technology is simple, and briquetting pressure is low, can use inexpensive fiber reinforced plastic mold and cost is reduced.

By the following examples structure of the present utility model is described further.

Fig. 1 is the upward view of embodiment one;

Fig. 2 is the A-A profile of Fig. 1;

Fig. 3 is the upward view of embodiment two;

Fig. 4 is the A-A profile of Fig. 3.

Embodiment one, this is the molded table top that the bottom surface has reinforcement, its sandwich layer (1) is the sisal hemp short fibre polymer matrix composites, is 3-20mm by length mainly and makes through pretreated sisal hemp short fibre and quantitative mixed with resin, and resin is the thermosetting unsaturated polyester resin.Upper surface layer (2) is a lustre adding layer, its key component is a unsaturated polyester resin, the second layer (3) is a colour stone layer, its key component is quartzy grain and unsaturated polyester resin, and the structure of this two-layer material, component are to adopt corresponding lustre adding layer of the disclosed structural product with colour stone effect of Chinese patent CN1103616A and colour stone layer.Bottom (4) is the resin gel coat.The thick 0.2-1mm of upper surface layer (2), the thick 2-6mm of the second layer (3), the thick 3-6mm of sandwich layer (1), the wide 20mm of the sandwich layer at reinforcement place, the thick 0.2-1mm of bottom (4).The second layer (3) and bottom (4) are coating sandwich layer (1), upper surface layer (2) second layer (3) that is being covered.Adopt the disclosed fiber reinforced plastic mold of Chinese patent CN2261322Y during making.

Embodiment two, and this is to be embedded with the compression molding stool face of assembling foot rest with screw, and sandwich layer (1) is sisal fiber woven cloth polymer matrix composites, and the number of plies of sisal fiber woven cloth is three layers; Upper layer (2) and bottom (3) are the unsaturated polyester resin gel coats.Upper layer (2) and bottom (3) are coating sandwich layer (1), and assembling is buried the people to sandwich layer (1) with the ailhead of screw (4).Upper layer (2) and the thick 0.2-1mm that is of bottom (3), the thick 4-5mm of sandwich layer (1).The same fiber reinforced plastic mold that adopts during making.

Claims

1, a kind of sisal fiber polymer matrix composites battenboard is the compression molding battenboard, it is characterized in that: it has sisal fiber polymer matrix composites sandwich layer and is coating the overlay of sandwich layer.

2, sisal fiber polymer matrix composites battenboard according to claim 1 is characterized in that sisal fiber is sisal hemp short fibre or sisal fiber woven cloth.

3, sisal fiber polymer matrix composites battenboard according to claim 1 and 2, it is characterized in that upper covering layer is two-layer, wherein superficial layer is that key component is the lustre adding layer of unsaturated polyester resin, and the second layer is that key component is the colour stone layer that polyester resin mixture is closed in quartzy grain and insatiable hunger.

4, sisal fiber polymer matrix composites battenboard according to claim 1 and 2 is characterized in that sandwich layer is sisal fiber and thermosetting unsaturated polyester resin, or and thermosetting phenolic resin, or with the epoxy resin composite material mixed.