CN103013149A

CN103013149A - Container bottom plate and preparation method thereof

Info

Publication number: CN103013149A
Application number: CN2012104520862A
Authority: CN
Inventors: 宋艳江
Original assignee: WUXI SHUNXUAN NEW MATERIAL CO Ltd; Hangzhou Normal University
Current assignee: WUXI SHUNXUAN NEW MATERIAL CO Ltd; Hangzhou Normal University
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2013-04-03
Anticipated expiration: 2032-11-13
Also published as: CN103013149B

Abstract

A container bottom plate, which is formed by laminating a wood-plastic composite material core plate and a continuous glass fiber reinforced cortex; the raw material components of the wood-plastic composite material core plate and the mass percentages of each component are: polyolefin resin: 20~ 35%; plant fiber powder: 40~70%; reinforcing filler: 0~30%; compatibilizer A: 2~5%; additive: 0~1%; The mass percentage of components is: synthetic resin: 20~50%; glass fiber: 45~70%; compatibilizer B: 0~10%; flame retardant: 0~10%; other additives: 0~2% The present invention uses waste wood fiber and synthetic resin as raw materials, and strengthens the performance of the bottom plate through the surface glass fiber, which saves resources and reduces costs on the basis of ensuring that the use requirements are met.

Description

A kind of container bottom board and preparation method thereof

Technical field

The present invention relates to technical field of floor, especially relate to wood plastic composite container bottom board of a kind of glass fibre enhancing and preparation method thereof.

Background technology

Container bottom board is mounted in the floor of container base, can play the effect of carrier weight, restraint of loads.In order to reduce hauled weight, be convenient to the fixing of goods, often adopt wooden base plate.But because the forest reserves is day by day deficient, timber resources is less and less, and the use of solid wood base plate is subject to great restriction, and is progressively replaced by glued board.Chinese patent (CN02134300.4) provides a kind of veneer board for container floor board that is become with Veneer gluings such as birch, poplar, tamarackes by the eucalyptus veneer.The base plate for container that Chinese patent (CN 03152841.4) provides a kind of top layer to be composed by bamboo wood thin plate and sandwich layer fast-growing veneer and wooden flake board.What these patents were used still is former green wood, and technique relates to the processes such as assembly, cloth glue, oven dry, hot pressing, and technique is loaded down with trivial details, works under hard conditions.Chinese patent (CN01136943) provides a kind of freight container plate made from synthetic resins and rice shell and wood chip.This plate is comprised of sandwich layer (55% ~ 75% synthetic resins and 45 ~ 25% rice shell and wood chip) and top layer (70 ~ 90% synthetic resins and 30 ~ 10% additive).This technique can be used waste and old wood materials, has saved timber resources.But this plate actual performance is difficult to reach the service requirements of container bottom board, only is suitable for wallboard or the top ceiling lower to performance requriements.

Summary of the invention

For the problems referred to above that prior art exists, the applicant provides a kind of container bottom board and preparation method thereof.The present invention is take waste and old wood fibre and synthetic resins as raw material, and by Watch glass fiber reinforcement base plate performance, guaranteeing that the basis that reaches service requirements saved resource, reduced cost.

Technical scheme of the present invention is as follows:

A kind of container bottom board strengthens the cortex applying by wood plastic composite central layer and continuous glass fibre and forms;

The feed composition of described wood plastic composite central layer and the mass percent of each component are:

Polyolefin resin: 20 ~ 35%;

Plant fiber powder: 40 ~ 70%;

Reinforcing filler: 0 ~ 30%;

Compatilizer A:2 ~ 5%;

Additive: 0 ~ 1%;

Described polyolefin resin be brand-new or the polyethylene, polypropylene and the polystyrene that reclaim in one or more mixture;

Described plant fiber powder is that one or more mixture of all kinds of timber, bamboo, crop stalk, shell is pulverized the powder that forms, and described powder particle size is less than 30 mesh sieves;

Described reinforcing filler is through overactivation or without one or more mixtures in the glass fibre of overactivation, glass microballon, talcum powder, calcium carbonate, kaolin, mica powder, the polynite;

Described continuous glass fibre strengthens the feed composition of cortex and the mass percent of each component is:

Synthetic resins: 20 ~ 50%;

Glass fibre: 45 ~ 70%;

Compatilizer B:0 ~ 10%;

Fire retardant: 0 ~ 10%;

Other auxiliary agent: 0 ~ 2%;

Described synthetic resins is that polythene PE, polypropylene PP, polystyrene PS, polycarbonate, polymethylmethacrylate are that PMMA, polyethylene terephthalate are that PET, acrylonitrile-butadiene-styrene copolymer are that ABS, polymeric amide are a kind of in the PA resin;

Described glass fibre is a kind of in the long yarn of continuous glass fibre, glasscloth, the glass mat;

The PE that described compatilizer A and B are respectively maleic anhydride graft is that the PP of PE-g-MA, maleic anhydride graft is that the POE of PP-g-MA, maleic anhydride graft is that the EPDM of POE-g-MA, maleic anhydride graft is that the SBS of EPDM-g-MA, maleic anhydride graft is that the SIS of SBS-g-MA, maleic anhydride graft is that the SEBS of SIS-g-MA, maleic anhydride graft is that the SEIS of SEBS-g-MA, maleic anhydride graft is a kind of among the SEIS-g-MA.

Described fire retardant is commercial fire retardant and the composition thereof that is applicable to resin.Described additive and other auxiliary agent are respectively the commercial lubricant of macromolecular material, stablizer and pigment.The method of described activation is: silane coupling agent, titanate coupling agent or aluminate coupling agent were stirred 5 ~ 10 minutes in the high-speed mixer high speed with described reinforcing filler.Described glass fibre is that granularity is less than the micro mist of 30 mesh sieves; Described talcum powder, calcium carbonate, kaolin, mica powder, polynite are that granularity is less than the micro mist of 500 mesh sieves.

The concrete preparation process of this container bottom board is as follows:

(1) preparation wood plastic composite central layer: polyolefin resin, plant fiber powder, reinforcing filler, compatilizer A and additive is evenly mixed in mixing equipment by mass percentage; Then the gained miscellany is added in the equidirectional parallel double-screw extruder and mix the wood plastic composite mixing materials of plasticating to get; At last above-mentioned mixing materials extrusion moulding is got the wood plastic composite central layer;

(2) the preparation continuous glass fibre strengthens the cortex prepreg: adopt forcing machine that synthetic resins, compatilizer B, fire retardant and other auxiliary agent are carried out fusion plastification and obtain resin melt, and be expressed on the separate-type paper of upper strata by extruder head, then with scraper resin melt is spread to even thin layer; To scribble at last the separate-type paper of resin melt with passing through compression roll through continuous glass fibre and lower floor's separate-type paper of row's yarn warping, and make the abundant impregnated glass fiber of resin melt namely get continuous glass fibre and strengthen the cortex prepreg.

(3) continuous glass fibre enhancing cortex prepreg plastifies, pushes, cools off, finalizes the design through moulding, curing mould together with the wood plastic composite central layer, obtains Watch glass fiber reinforcement wood-plastic composite board, i.e. container bottom board of the present invention.

Mould the bond performance of central layer for improving fiber reinforced skin and wood, preferably mould the consistent resin of central layer with wood, or add corresponding compatilizer.

The technique effect that the present invention is useful is:

1, wood plastic composite is central layer, use be waste and old wood fiber powder, can save a large amount of timber resources.

2, the synthetic resins that uses can be waste and old thermoplastic resin, can alleviate white pollution; Save energy.

3, Cortical fiber strengthens, and can significantly improve intensity, rigidity, the wear-resisting and creep-resistant property of material, and can satisfy by the control preparation of simple skin thickness the sheet material of different performance demand.

The freight container wood plastic composite base plate that 4, can prepare by the selection of top layer resin surface flame-retardant.

5, this processing method is suitable for continuously shapedly, and production efficiency is high, constant product quality.

Description of drawings

Fig. 1 is that the structure of this container bottom board forms schematic diagram;

Fig. 2 strengthens the processing method schematic diagram of cortex prepreg for the preparation continuous glass fibre;

Fig. 3 is the processing method schematic diagram of this container bottom board of preparation.

Embodiment

Below in conjunction with accompanying drawing 1 ~ 3, the present invention is specifically described.Can be seen by Fig. 1, this container bottom board is divided into three layers, and the two-layer continuous glass fibre that is strengthens cortex 1 up and down, and middle one deck is wood plastic composite central layer 2.

Concrete preparation method is:

The first step, the preparation continuous glass fibre strengthens the cortex prepreg, as shown in Figure 2.The mixture of synthetic resins, compatilizer B, fire retardant and other auxiliary agent added by mass percentage carry out melting mixing in the forcing machine 7, resin melt through melting mixing is expressed on the upper strata separate-type paper 8, and spread to even thin layer with scraper 6, then will scribble the upper strata separate-type paper 8 of resin melt with passing through compression roll 5 through glass continuous filament yarn and lower floor's separate-type paper 9 of fiber frame 3 and row's yarn warping 4, make the abundant impregnated glass fiber of resin melt, obtain continuous glass fibre finally by rolling 10 and strengthen cortex prepreg 13.

Second step, preparation wood plastic composite central layer 2, as shown in Figure 3.First that polyolefin resin, plant fiber powder, reinforcing filler, compatilizer A and additive is evenly mixed in mixing equipment by mass percentage; Then the gained miscellany is added mix in the equidirectional parallel double-screw extruder 11 and plasticate, obtain the wood plastic composite mixing materials; At last with the wood plastic composite central layer 2 of above-mentioned mixing materials by forming mould 12 extrusion mouldings;

In the 3rd step, as shown in Figure 3, in the time of the wood plastic composite central layer of forming mould 12 extrusion mouldings 2, continuous glass fibre strengthens cortex prepreg 13 and converges by roller and wood plastic composite central layer 2, envelopes up and down wood plastic composite central layer 2; Then together through overmolding, curing mold 14, through plasticizing, extruding, cooling, typing, namely obtain this container bottom board;

In second step, reinforcing filler can activate, and activation method is that silane coupling agent, titanate coupling agent or aluminate coupling agent were stirred 5 ~ 10 minutes in the high-speed mixer high speed with described reinforcing filler.

Embodiment 1

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 1.

Table 1

Figure 2012104520862100002DEST_PATH_IMAGE001

Embodiment 2

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 2.

Table 2

Embodiment 3

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 3.

Table 3

Embodiment 4

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 4.

Table 4

Figure 2012104520862100002DEST_PATH_IMAGE004

Embodiment 5

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 5.

Table 5

Embodiment 6

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 6.

Table 6

Embodiment 7

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 7.

Table 7

Embodiment 8

Concrete preparation method as mentioned above, each raw material and mass percent thereof are as shown in table 8.

Table 8

Claims

1. A container bottom plate, characterized in that it is formed by bonding a wood-plastic composite material core plate and a continuous glass fiber reinforced cortex;

The raw material components of the wood-plastic composite material core board and the mass percentages of each component are:

Polyolefin resin: 20~35%;

Plant fiber powder: 40~70%;

Reinforcing filler: 0~30%;

Compatibilizer A: 2~5%;

Additives: 0~1%;

The polyolefin resin is one or a mixture of new or recycled polyethylene, polypropylene and polystyrene;

The plant fiber powder is a powder obtained by pulverizing one or more mixtures of various types of wood, bamboo, crop stalks, and fruit shells, and the particle size of the powder is less than 30 mesh sieves;

The reinforcing filler is one or more mixtures of activated or unactivated glass fibers, glass microspheres, talcum powder, calcium carbonate, kaolin, mica powder, and montmorillonite;

The compatibilizer A is PE-g-MA grafted with maleic anhydride, PP-g-MA grafted with maleic anhydride, POE-g-MA grafted with maleic anhydride, and POE-g-MA grafted with maleic anhydride. EPDM grafted with maleic anhydride is EPDM-g-MA, SBS grafted with maleic anhydride is SBS-g-MA, SIS grafted with maleic anhydride is SIS-g-MA, SEBS grafted with maleic anhydride is SEBS -g-MA, maleic anhydride grafted SEIS is one of SEIS-g-MA;

The raw material components of the continuous glass fiber reinforced cortex and the mass percentages of each component are:

Synthetic resin: 20~50%;

Glass fiber: 45~70%;

Compatibilizer B: 0~10%;

Flame retardant: 0~10%;

Other additives: 0~2%;

The synthetic resin is polyethylene PE, polypropylene PP, polystyrene PS, polycarbonate PC, polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), acrylonitrile-butadiene - Styrene copolymer is ABS, polyamide is one of PA resins;

Described glass fiber is a kind of in continuous glass fiber long yarn, glass fiber cloth, glass fiber mat;

The compatibilizer B is PE-g-MA grafted with maleic anhydride, PP-g-MA grafted with maleic anhydride, POE-g-MA grafted with maleic anhydride, and POE-g-MA grafted with maleic anhydride. EPDM grafted with maleic anhydride is EPDM-g-MA, SBS grafted with maleic anhydride is SBS-g-MA, SIS grafted with maleic anhydride is SIS-g-MA, SEBS grafted with maleic anhydride is SEBS -g-MA, SEIS grafted with maleic anhydride is one of SEIS-g-MA.

2. The container bottom plate according to claim 1, characterized in that the flame retardant is a commercially available flame retardant suitable for resins and a composition thereof.

3. The container bottom plate according to claim 1, characterized in that the additive and other auxiliary agents are respectively commercialized lubricants, stabilizers and pigments of polymer materials.

4. The container bottom plate according to claim 1, characterized in that the activation method is: using a silane coupling agent, a titanate coupling agent or an aluminate coupling agent together with the reinforcing filler at a high speed Mix in a mixer at high speed for 5-10 minutes.

5. The container bottom plate according to claim 1, characterized in that the glass fibers are micropowders with particle size less than 30 mesh sieves; fine powder through a mesh sieve.

6. the preparation method of container bottom plate described in claim 1 is characterized in that concrete preparation steps are as follows:

(1) Preparation of wood-plastic composite material core board: mix polyolefin resin, plant fiber powder, reinforcing filler, compatibilizer A and additives in a mixing device according to mass percentage; then add the obtained mixture into co-rotating parallel twin-screw Mixing and masticating in the extruder to obtain a wood-plastic composite material compound; finally extruding the above-mentioned compound material to obtain a wood-plastic composite material core board;

(2) Preparation of continuous glass fiber reinforced skin prepreg: use an extruder to melt and plasticize the synthetic resin, compatibilizer B, flame retardant and other additives to obtain a resin melt, and extrude it through the extrusion head onto the upper release paper, and then use a scraper to scrape the resin melt into a uniform thin layer; finally, the release paper coated with the resin melt is compacted together with the continuous glass fibers that have been warped and the lower release paper roller, so that the resin melt is fully impregnated with glass fiber to obtain a continuous glass fiber reinforced skin prepreg;

(3) The continuous glass fiber reinforced cortex prepreg is molded together with the wood-plastic composite material core board, and the curing mold is plasticized, extruded, cooled, and shaped to obtain the surface glass fiber reinforced wood-plastic composite material board, which is the container of the present invention bottom plate.