CN104193911A - Sheet-shaped mould plastic for manufacturing inspection well lid and preparation method for sheet-shaped mould plastic - Google Patents
Sheet-shaped mould plastic for manufacturing inspection well lid and preparation method for sheet-shaped mould plastic Download PDFInfo
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- CN104193911A CN104193911A CN201410460296.5A CN201410460296A CN104193911A CN 104193911 A CN104193911 A CN 104193911A CN 201410460296 A CN201410460296 A CN 201410460296A CN 104193911 A CN104193911 A CN 104193911A
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Abstract
The invention firstly provides an environment-friendly and low-cost sheet-shaped mould plastic for manufacturing an inspection well lid. A middle core material of the sheet-shaped mould plastic consists of glass fiber cloth which is soaked with resin paste, wherein the content of glass fibers is 20-40 parts, and the resin paste comprises the following materials in parts by weight: 19-23 parts of unsaturated resin, 6-8 parts of a low shrinkage agent, 1.4-1.6 parts of styrene, 0.5-1.5 parts of a curing agent, 1.5-1.7 parts of zinc stearate, 0.01-0.03 part of benzoquinone, 0.2-0.3 part of pigment paste, and 40-50 parts of ground calcium carbonate of 800-1000 meshes. The invention further provides a method for preparing the sheet-shaped membrane plastic. The sheet-shaped mould plastic provided by the invention adopts base raw materials, and further adopts waste ground calcium carbonate, is low in cost and beneficial to environmental protection and energy conservation. The sheet-shaped mould plastic manufactured by virtue of the method is high in technical content, stable in process, relatively low in cost, strong in bearing capacity; and a product manufactured by virtue of the sheet-shaped mould plastic has the characteristics of tight matching, wear resistance, corrosion resistance, a light structure, an attractive style, light weight and easiness in installation, is remarkable in social benefit and economic benefit.
Description
Technical field
The present invention relates to a kind of sheet molding compound, particularly make the laminar film plastic of inspection well cover; The invention still further relates to the preparation method of this sheet molding compound.
Background technology
SMC--sheet molding compound: SMC is the abbreviation of Sheet molding compound, i.e. sheet molding compound.Main raw material is by the special-purpose non-alkali yarn of SMC, unsaturated polyester, low shrinkage additive, and filler and various auxiliary agent form.SMC has superior electric property, corrosion resistance nature, and the advantage such as light weight and engineering design are easy, flexible, its mechanical property can compare favourably with part metals material, thereby is widely used in the industries such as carrier vehicle, building, electronics, electric, well lid.
Conventionally, in making the SMC material of inspection well cover, it is generally comprised of synthetic resins, strongthener and subsidiary material three major types.
1, synthetic resins synthetic resins is unsaturated polyester resin, and different unsaturated polyesters all has direct impact to the thickening effectiveness of resin paste, operational characteristic and product properties, shrinking percentage, condition of surface.SMC has following requirement to unsaturated polyester resin:
1) viscosity is low, can be good to glass fibre, glass fiber cloth infiltrating;
2) with thickening material, there is enough reactivities, meet thickening requirement;
3) solidify rapidly, with short production cycle, efficiency is high;
4) cured article has enough hot strengths, is convenient to the hot demoulding of goods;
5) cured article has enough toughness, and goods do not ftracture while there is some distortion;
6) lower shrinking percentage.
2, strongthener strongthener is short glass fiber rove, precursor or glass mat.Content of glass fiber can regulate between 5%～50%.
3, subsidiary material subsidiary material comprise solidifying agent (initiator), surface treatment agent, thickening material, low shrinkage additive, releasing agent, tinting material, filler and linking agent.
Above-mentioned for making the material of inspection well cover, all in all materials are more, and cost is higher, a little less than supporting capacity, current domestic mold pressing combined manhole cover, and great majority adopt the compacting of BMC Bulk Molding Compound to form.Main component comprises unsaturated polyester resin, vinylbenzene, glass fibre, filler (as stone flour), and various additive, and as thickening material, solidifying agent, stopper, inner pattern releasing agent applicable, conventional have light magnesium oxide, the tert-butyl ester, a Zinic stearas etc.Glass fibre is born the major portion of physical strength, and filler can reduce costs and improve the performances such as viscosity of resin binder.And adopt Steel Skeleton as load assembly.BMC mechanical strength not very good (flexural strength is generally 80---120MPa), can only add reinforcing bar to increase load.And adding of reinforcing bar forms material and have two large defects: 1. rebar surface has rust, often cause material interface in conjunction with bad (if composite material interface, in conjunction with bad, just can not produce the effect of 1+1>2); 2. reinforcing bar is metallic substance, and BMC material is non-metallic material, and bi-material is because of the difference of thermal expansivity.Under differing temps, (early, middle and late, winter, summer) material interface will form stress, in addition vehicle rolls repeatedly, can cause reinforcing bar and BMC material to depart from, finally cause well lid to lose supporting capacity and (specifically how long lose supporting capacity, depend on recombining process and working conditions in enterprise's making processes, perhaps 2-3, perhaps longer).
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Summary of the invention
The present invention's technical problem first to be solved is to provide a kind of environmental protection, sheet molding compound that cost is low, and this sheet molding compound is mainly for the manufacture of inspection well cover.For this reason, the present invention is by the following technical solutions: the middle core of sheet molding compound is comprised of the glasscloth that has flooded resin paste, and glasscloth content is 20-40 part, and described resin paste comprises following material::
Unsaturated polyester 19-23 part; Shrinking agent 6-8 part; Vinylbenzene 1.4-1.6 part; Solidifying agent 0.5-1.5 part; Zinic stearas 1.5-1.7 part; Benzoquinones 0.01-0.03 part; Pigment paste 0.2-0.3 part; Water-ground limestone 800-1000 order 40-50 part.
Preferably, described resin paste is made by following material: 21 parts of unsaturated polyesters; 7 parts of shrinking agents; 1.5 parts of vinylbenzene; 1 part, solidifying agent; 1.6 parts of Zinic stearass; 0.02 part of benzoquinones; 0.25 part of pigment paste; 45 parts, water-ground limestone 800-1000 order.
Wherein, described shrinking agent is P S(polystyrene), PMMA(polymethylmethacrylate), PVAc(polyvinyl acetate (PVA)) or PET(saturated polyester) in any one.
Solidifying agent is TBPB(peroxidized t-butyl perbenzoate) and TBPO(peroxidation-2-ethyl acid tert-butyl ester) composite initiation system, wherein the weight proportion of TBPB and TBPO is 0.1-0.3:0.7-0.8.Preferably, in described solidifying agent, the weight proportion of TBPB and TBPO is 0.3:0.7.
The present invention also provides a kind of and has prepared above-mentionedly for making the method for the laminar film plastic of inspection well cover, and the method comprises the following steps:
1), unsaturated polyester 19-23 part, shrinking agent 6-8 part, vinylbenzene 1.4-1.6 part, solidifying agent 0.5-1.5 part, Zinic stearas 1.5-1.7 part, benzoquinones 0.01-0.03 part, pigment paste 0.2-0.3 part are put into batching kettle and stir 30-60 minute interpolation water-ground limestone 800-1000 order 40-50 part;
2), stir and after 60-120 minute, to add magnesium oxide rapid stirring 20-30 to make resin paste second; SMC goods equipment is provided with hopper, at once pours resin paste into hopper; On hopper, have 2 cluster film volumes, film rolling rear portion is provided with upper and lower 2 groups of driving types extruding and strengthens steel wire net-belt; Transmission steel wire net-belt during starting outfit, imports film it is clipped between upper and lower guipure layer; Resin paste in hopper is evenly coated in material on film automatically by adjustable baffle plate; Between upper and lower thin film layer, be separately provided with glass fibre yardage roll, during equipment operation, by transmission steel wire net-belt, be involved in 20-40 part glass-fiber-fabric, make it automatically be squeezed in the middle initial stage sheet molding compound of making of thin film layer up and down that scribbles resin paste; Initial stage sheet molding compound is involved in machine guipure to be made it invade profit to make sheet molding compound after glasscloth by continuously extruded.
3), the sheet molding compound now made, enter the heating of 45-55 degree drying room and within 24-48 hour, carry out multiviscosisty, when its viscosity reach mold pressing range of viscosities and stable after, be this sheet molding compound finished product.
Preferably, the raw material adding in described step 1) is 21 parts of unsaturated polyesters, 7 parts of shrinking agents, 1.5 parts of vinylbenzene, 1 part, solidifying agent, 1.6 parts of Zinic stearass, 0.02 part of benzoquinones, 0.25 part of pigment paste, 45 parts, water-ground limestone 800-1000 order.
Owing to having adopted technical scheme of the present invention, provided by the present invention is basic raw material for making the raw material of the sheet molding compound employing of inspection well cover, and cost is low, has also adopted in addition waste water-ground limestone, is beneficial to environmental protection and energy saving.The sheet molding compound that adopts the method for the invention to make possesses skills that content is high, process stabilizing, cost is lower, supporting capacity is strong, with the inspection well cover that this invention product is made have coincide tight, wear-resisting, corrosion-resistant, structure is light, attractive in fashion, from heavy and light, the feature of easily installing, product is applied in correlation engineering, social benefit, remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is the preparation flow figure of laminar film plastic of the present invention.
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Embodiment
Below, by reference to the accompanying drawings the present invention is further elaborated.
Embodiment 1:
In making inspection well cover process, the material sheet molding compound of use is most important, and in the middle of it, core is comprised of the glasscloth that has flooded resin paste, and glasscloth content is 20-40 part, and described resin paste comprises following material:
Unsaturated polyester 19-23 part; Shrinking agent 6-8 part; Vinylbenzene 1.4-1.6 part; Solidifying agent 0.5-1.5 part; Zinic stearas 1.5-1.7 part; Benzoquinones 0.01-0.03 part; Pigment paste 0.2-0.3 part; Water-ground limestone 800-1000 order 40-50 part.
Preferably, described resin paste is made by following material: 21 parts of unsaturated polyesters; 7 parts of shrinking agents; 1.5 parts of vinylbenzene; 1 part, solidifying agent; 1.6 parts of Zinic stearass; 0.02 part of benzoquinones; 0.25 part of pigment paste; 45 parts, water-ground limestone 800-1000 order, wherein water-ground limestone is rejected material, and the present invention is turned waste into wealth, and has stronger environmental protection and energy saving effect, and social benefit and economic benefit are good.
Wherein, described shrinking agent is any one in polystyrene PS, polymetylmethacrylate, polyvinyl acetate (PVA) PVAc or saturated polyester PET.
Solidifying agent is TBPB and TBPO composite initiation system, and wherein the weight proportion of TBPB and TBPO is 0.1-0.3:0.7-0.8.Preferably, in described solidifying agent, the weight proportion of TBPB and TBPO is 0.3:0.7.
Embodiment 2:
As shown in Figure 1, the technical process that sheet molding compound (SMC) is produced mainly comprises resin paste preparation, the operation of upper paste, invades the processes such as profit, multiviscosisty.The preparation method that binding resin is stuck with paste, the preparation technology of sheet molding compound (SMC) is as follows:
1), unsaturated polyester 19-23 part, shrinking agent 6-8 part, vinylbenzene 1.4-1.6 part, solidifying agent 0.5-1.5 part, Zinic stearas 1.5-1.7 part, benzoquinones 0.01-0.03 part, pigment paste 0.2-0.3 part are put into batching kettle 2, stir and add thickening material in 30-60 minute, thickening material is water-ground limestone 800-1000 order 40-50 part;
2), stir and after 60-120 minute, to add magnesium oxide rapid stirring 20-30 to make resin paste second; SMC goods equipment is provided with hopper, at once pours resin paste into hopper; On hopper, have 2 cluster film volumes, film rolling rear portion is provided with upper and lower 2 groups of driving types extruding and strengthens steel wire net-belt, and the mesh reinforcements of using in described enhancing steel wire net-belt is continuous fiberglass needled mat 1; Transmission steel wire net-belt during starting outfit, imports film it is clipped between upper and lower guipure layer; Resin paste in hopper is evenly coated in material on film automatically by adjustable baffle plate; Between upper and lower thin film layer, be separately provided with glass fibre yardage roll, during equipment operation, by transmission steel wire net-belt, be involved in 20-40 part glasscloth, glass fibers cloth as used herein is generally the braiding of roving glass and forms, roving glass in accompanying drawing refers to roving glasscloth, it is squeezed in the middle of scribbling the thin film layer up and down of resin paste automatically and makes initial stage sheet molding compound, general fashion of extrusion is roll-in; Initial stage sheet molding compound is involved in machine guipure to be made it invade profit to make sheet molding compound after glasscloth by continuously extruded.
3), the sheet molding compound now made, enter the heating of 45-55 degree drying room and within 24-48 hour, carry out multiviscosisty, when its viscosity reach mold pressing range of viscosities and stable after, be this sheet molding compound finished product.
SMC material weather resistance of the present invention is strong, stability is high, stable preparation process, cost is lower, supporting capacity is strong, makes goods, such as inspection well cover with this invention product, have coincide tight, wear-resisting, corrosion-resistant, structure is light, attractive in fashion, from heavy and light, the feature of easily installing, product is applied in correlation engineering, social benefit, remarkable in economical benefits.
Claims (7)
1. for making a sheet molding compound for inspection well cover, it is characterized in that the middle core of this sheet molding compound is comprised of the glasscloth that has flooded resin paste, glasscloth content is 20-40 part, and described resin paste comprises following material:
Unsaturated polyester 19-23 part;
Shrinking agent 6-8 part;
Vinylbenzene 1.4-1.6 part;
Solidifying agent 0.5-1.5 part;
Zinic stearas 1.5-1.7 part;
Benzoquinones 0.01-0.03 part;
Pigment paste 0.2-0.3 part;
Water-ground limestone 800-1000 order 40-50 part.
2. as claimed in claim 1 a kind of for making the sheet molding compound of inspection well cover, it is characterized in that described resin paste made by following material:
21 parts of unsaturated polyesters;
7 parts of shrinking agents;
1.5 parts of vinylbenzene;
1 part, solidifying agent;
1.6 parts of Zinic stearass;
0.02 part of benzoquinones;
0.25 part of pigment paste;
45 parts, water-ground limestone 800-1000 order.
3. as claimed in claim 1 a kind of for making the sheet molding compound of inspection well cover, it is characterized in that described shrinking agent is any one in PS, PMMA, PVAc or PET.
4. as claimed in claim 1 a kind of for making the sheet molding compound of inspection well cover, it is characterized in that solidifying agent is TBPB and TBPO composite initiation system, wherein the weight proportion of TBPB and TBPO is 0.1-0.3:0.7-0.8.
5. as claimed in claim 4 a kind of for making the sheet molding compound of inspection well cover, it is characterized in that in described solidifying agent, the weight proportion of TBPB and TBPO is 0.3:0.7.
6. preparation is as claimed in claim 1 for making the method for the sheet molding compound of inspection well cover, it is characterized in that it comprises the following steps,
1), unsaturated polyester 19-23 part, shrinking agent 6-8 part, vinylbenzene 1.4-1.6 part, solidifying agent 0.5-1.5 part, Zinic stearas 1.5-1.7 part, benzoquinones 0.01-0.03 part, pigment paste 0.2-0.3 part are put into batching kettle and stir 30-60 minute interpolation water-ground limestone 800-1000 order 40-50 part;
2), stir and after 60-120 minute, to add magnesium oxide rapid stirring 20-30 to make resin paste second; SMC goods equipment is provided with hopper, at once pours resin paste into hopper; On hopper, have 2 cluster film volumes, film rolling rear portion is provided with upper and lower 2 groups of driving types extruding and strengthens steel wire net-belt; Transmission steel wire net-belt during starting outfit, imports film it is clipped between upper and lower guipure layer; Resin paste in hopper is evenly coated in material on film automatically by adjustable baffle plate; Between upper and lower thin film layer, be separately provided with glass fibre yardage roll, during equipment operation, by transmission steel wire net-belt, be involved in 20-40 part glasscloth, make it automatically be squeezed in the middle initial stage sheet molding compound of making of thin film layer up and down that scribbles resin paste; Initial stage sheet molding compound is involved in machine guipure to be made it invade profit to make sheet molding compound after glasscloth by continuously extruded;
?3), the sheet molding compound now made, enter the heating of 45-55 degree drying room and within 24-48 hour, carry out multiviscosisty, when its viscosity reach mold pressing range of viscosities and stable after, be this sheet molding compound finished product.
7. preparation method as claimed in claim 6, is characterized in that the raw material adding in described step 1) is 21 parts of unsaturated polyesters, 7 parts of shrinking agents, 1.5 parts of vinylbenzene, 1 part, solidifying agent, 1.6 parts of Zinic stearass, 0.02 part of benzoquinones, 0.25 part of pigment paste, 45 parts, water-ground limestone 800-1000 order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460296.5A CN104193911A (en) | 2014-09-11 | 2014-09-11 | Sheet-shaped mould plastic for manufacturing inspection well lid and preparation method for sheet-shaped mould plastic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410460296.5A CN104193911A (en) | 2014-09-11 | 2014-09-11 | Sheet-shaped mould plastic for manufacturing inspection well lid and preparation method for sheet-shaped mould plastic |
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| CN104193911A true CN104193911A (en) | 2014-12-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542506A (en) * | 2016-01-28 | 2016-05-04 | 江苏蓝泰复合材料有限公司 | SMC (sheet molding compound) material for automobile accessories and preparation method thereof |
| CN105778453A (en) * | 2016-01-25 | 2016-07-20 | 衡水润通公铁路桥器材有限公司 | SMC drain pipe and preparation material and preparation method thereof |
| US10358285B2 (en) | 2015-04-10 | 2019-07-23 | Channell Commercial Corporation | Thermoset polymer utility vault lid |
| CN110894340A (en) * | 2019-10-11 | 2020-03-20 | 王小军 | Pit cover utilizing waste epoxy resin powder and preparation method thereof |
| CN111518383A (en) * | 2020-06-08 | 2020-08-11 | 常熟市华邦汽车复合材料有限公司 | SMC molding compound with strong wear resistance and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10358285B2 (en) | 2015-04-10 | 2019-07-23 | Channell Commercial Corporation | Thermoset polymer utility vault lid |
| CN105778453A (en) * | 2016-01-25 | 2016-07-20 | 衡水润通公铁路桥器材有限公司 | SMC drain pipe and preparation material and preparation method thereof |
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| CN110894340A (en) * | 2019-10-11 | 2020-03-20 | 王小军 | Pit cover utilizing waste epoxy resin powder and preparation method thereof |
| CN111518383A (en) * | 2020-06-08 | 2020-08-11 | 常熟市华邦汽车复合材料有限公司 | SMC molding compound with strong wear resistance and preparation method thereof |
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Application publication date: 20141210 |