CN105694498A - Vegetable fiber composite material - Google Patents

Abstract

The invention discloses a vegetable fiber composite material comprising vegetable fibers as a main raw material and other chemical engineering raw materials as auxiliary materials. The composite material comprises, by mass, 45-47% of the vegetable fibers, 35-44% of resin glue, 3.5-5% of a curing agent and 3-7% of alcohol, wherein the vegetable fibers contain 88-94 mass% of wood wool powder. The vegetable fiber composite material has high density and comprehensive strength, has a water absorption rate of 2.4% or less, has good an insulation performance, can resist 15,000V breakdown for 1min, does not deform or age, can resist corrosion, and is an ideal material for making furniture, construction decorations and handicrafts.

Description

Composite material of plant fiber

The present invention relates to a kind of composite, particularly a kind of with Plant fiber for primary raw material, with the composite material of plant fiber that other industrial chemicals prepares for auxiliary material。

At present, prior art related to the present invention such as notification number is Chinese patent disclosed in CN1051008A, name is called " waste plastics and composite material of plant fiber ", it is with a large amount of Plant fiber particularly wood flour for filler, with used heat thermoplastic plastic for binding agent, composite through certain process combining, although it is low that this composite has cost, plasticity is strong, the advantages such as good toughness, but owing to it is with plastics for binding agent, thus make the composite prepared exist easily aging, deflection is big, vary with temperature shortcomings such as easily becoming fragile, and generally plastics all contain noxious substance。Additionally, with Plant fiber for the main composite made also such as fibre board, the plant fiber particle footpath of fibre board selection is relatively larger, is typically in 8～20 orders, in proportioning, the ratio of rubber polymer is relatively low, generally adopt 20～24%, and all relatively low at processing technology upward pressure and temperature, thus the weak point of fibre board to be intensity low, water absorption rate is high, corrosion-resistant, and resistivity changes greatly after making moist, density is low。

It is an object of the invention to provide a kind of intensity, density height, corrosion-resistant good with crushing resistance, it is unlikely to deform aging composite material of plant fiber。

It is an object of the invention to be realized by techniques below scheme, composite material of plant fiber is by (quality %): 45～47 Plant fiber, 35～44 resin glues, 3.5～5 firming agent and 3～7 ethanol composition。In said ratio, in Plant fiber, optional wood down powder is primary raw material, it can account for the 88～94% of Plant fiber's proportioning, other Plant fiber is as auxiliary material, because the cost of wood down powder is relatively low, it it is the recycling of waste material, wood down powder can be considered to be worth doing by redwood, Rhizoma Atractylodis macrocephalae considers to be worth doing, the size-reduced processing of weed tree sawdust prepares, other Plant fiber can be phragmites communis, cotton stalk, wheat straw etc., wood down powder and other Plant fiber are both needed to first flour before dispensing, making plant granule footpath is 180～200, order so can ensure that the density of material and the bright and clean of product surface, what the binding agent of the present invention adopted is resin glue, Plant fiber's powder is served firmly cementation by it, and hot forming under the pressure of 350～400kg/cm2 and the temperature of 180～220 DEG C, resin glue is made fully to permeate the surface in Plant fiber, rapid solidification, improve intensity and the density of material, resin glue to first pass through ethanol before use and dissolve, then again with Plant fiber, firming agent is sufficiently stirred for together, so as to Homogeneous phase mixing, the effect of firming agent is the quick shaping promoting material further。The present invention is adding man-hour, it is possible to add different pigment as required, makes imitative redwood, antique copper, parian material, and various furniture is made in mold pressing, builds decoration, workmanship, household electrical appliances auxiliary equipment etc.。

The present invention compared with prior art, crosses 180～200 order wood floss plant fiber materials owing to having selected, and select highdensity resin glue is binding agent simultaneously, makes the density of composite can reach 1.4～1.6g/cm3, more than vegetable fibre board is doubled；Comprcssive strength is 226MPd, improves nearly twice than vegetable fibre board, and hardness is HB234, and water absorption rate, below 2.4%, has been reduced to 15 times than fibre board。It addition, the composite that the present invention makes, good insulation preformance, can within 1 minute, not puncturing by proof voltage 1.5 ten thousand volts, dielectric strength is 6.67MV/M；Undeformable and indehiscent, is also less prone to aging, independent of temperature variations, and good corrosion resistance, avirulence。

Below for 100kg dispensing, select different proportionings that the present invention is described in further detail。

Embodiment 1, select Plant fiber 45kg, wherein weed tree sawdust powder 39.6kg, cotton stalk fiber 4.9kg, 2127 phenolic resin glue 44kg, the powder 4.5kg that wakes up, ethanol 5.5kg, technical process are such, first Plant fiber and weed tree sawdust powder and cotton stalk fiber uniform mixing, then range for the hammer crusher of 180～200 orders is crushed to regulation fineness at fineness regulation。By 2127 phenolic resin glues ethanol mixed dissolution, then the resin glue after Plant fiber, dissolving, powder of waking up are mixed and stirred together, mix and stir in process at above-mentioned material, the pigment after dissolving can be added as required, mix and stir 70 minutes to 85 minutes, make pigment, Plant fiber, resin glue, powder of waking up reach uniformity。After mixing, taking out and dry, the moisture content after drying reaches 9～11%, sealed storage can be packed stand-by, it is necessary to when making product, emboss again, being put into by mixed material in required product shaped mold, hot pressurize 25～35 seconds on hydraulic press, mold temperature is 185～195 DEG C；Pressure is 350～400kg/cm2, also to exit 2～3 times in hot pressing, and each interval time is 30 seconds to 40 seconds, the moisture content in material is made fully to vapor away, then pressurize is taken out for 2～3 minutes again, removes product burr, overlap, correction, polishing, makes product bright and clean unanimously。

Embodiment 2, takes red wood dust 44.1kg, reed fiber 4.9kg, 2127 phenolic resin glue 41kg, awake powder 4.5kg, ethanol 5.5kg, technical process and embodiment 1 identical。

Embodiment 3, takes white wood dust 44kg, wheat straw fiber 5kg, 2127 phenolic resin glue 39kg, awake powder 4kg, ethanol 4kg, technical process and embodiment 1 identical。

Embodiment 4, takes weed tree sawdust powder 51.3kg, wheat straw fiber 5.7kg, 2127 phenolic resin glue 35kg, awake powder 4.5kg, ethanol 3.5kg, technical process and embodiment 1 identical。

Claims (3)

1. a composite material of plant fiber, is characterized in that by (quality %): 45～47 Plant fiber, 35～44 resin glues, 3.5～5 firming agent, 3～7 ethanol form, wherein containing (quality %) in Plant fiber: the wood down powder of 88～94。

2. composite material of plant fiber according to claim 1, is characterized in that the granule footpath of Plant fiber is 180～200 orders。

3. composite material of plant fiber according to claim 1 and 2, is characterized in that resin glue is high density phenolic resin glue。