CN103192560B - Food and medicine conveyor belt and making method thereof - Google Patents
Food and medicine conveyor belt and making method thereof Download PDFInfo
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- CN103192560B CN103192560B CN201210004459.XA CN201210004459A CN103192560B CN 103192560 B CN103192560 B CN 103192560B CN 201210004459 A CN201210004459 A CN 201210004459A CN 103192560 B CN103192560 B CN 103192560B
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Abstract
The invention relates to a food and medicine conveyor belt and a making method thereof. The conveyor belt is a four-layer structure conveyor belt formed by compounding a food grade silica gel coat, a mesh fabric interlayer, a soft PVC layer and a compact fabric substrate which are sequentially arrayed from top to bottom. The food and medicine conveyor belt is made through a hot pressing and coating technology. The preparation method comprises the following steps: setting the mesh fabric and the compact fabric, carrying out hot pressing compounding of the set mesh fabric and compact fabric and PVC, and coating the surface by a food grade silica gel to form a finished product. Compared with conveyor belts in the prior art, the conveyor belt provided by the invention has the advantages of long service life, low cost, reaching of food and medicine contact standards, and suitableness for the food and medicine fields.
Description
Technical field
The present invention relates to a kind of silica gel conveying belt, especially relate to a kind of food and medicine conveyer belt and preparation method thereof.
Background technology
Conveyer belt is that the important set of ribbon conveyer wants part, acts primarily as the effect carrying material, due to ribbon conveyer
There is transmission efficiency height, safe operation, easy to use, the simple feature of maintenance, be widely used in industrial production line,
Greatly improve production efficiency.
The species of conveyer belt is more, the difference according to conveyer belt belt carcass can be divided into fabric core conveyor belt, integral fabric belt carcass,
Steel cable core conveying belt, steel mesh conveying belt and steel cable conveyor belt.Wherein textile belt belongs to light-type conveyer belt, is mainly used in holding
The relatively low occasion of weight, mainly has duck belt carcass, polyamide fibre canvas belt carcass, polyester canvas belt carcass, aramid fiber canvas belt carcass, integral fabric
Belt carcass etc. is several.
Food, medicine are mainly pu material with conveyer belt in the market, because pu conveyer belt conventional on market is easily raw
The environment-friendly type polyester tpu of thing degraded, the cellular construction of its open chain can allow air therefrom to walk, and this molecular structure feature leads to
It is especially sensitive to the attack of microorganism, thus leading to fungi and the spore of bacterium can deposit wherein, so will in antibacterial
Ask higher application scenario or existing defects, Chinese patent cn102167212a discloses a kind of fresh food conveying antibacterial
Polyether-type tpu conveyer belt and its manufacture method, add nano silver antimicrobials to improve the antibacterial effect of conveyer belt in tpu；In
State's patent cn201494878 discloses a kind of silica gel conveyer belt used in food industries, by dacron skeleton as sandwich layer, knits in terylene
Coated with silica gel as top layer, this technical scheme has preferable antibacterial effect using silica gel as top layer to thing skeleton upper and lower surface,
But the adhesiveness of top layer silica gel is bad, be easily peeled, and the creep-resistant property of this conveyer belt and service life unsatisfactory.
Content of the invention
The purpose of the present invention is exactly to overcome the defect of above-mentioned prior art presence to provide a kind of long service life, one-tenth
This is low, reach contact food, the drug standards it is adaptable to food, the food and medicine conveyer belt of medicine field and its preparation side
Method.
The purpose of the present invention can be achieved through the following technical solutions: a kind of food and medicine conveyer belt, and this conveyer belt is
Food grade silicone coating, mesh fabric intermediate layer, pvc softwood layer and the densified fabric bottom complex group being arranged in order from top to bottom
The four-layer structure conveyer belt becoming.
A kind of preparation method of food and medicine conveyer belt, the step of the method is as follows:
1) by mesh fabric, densified fabric respectively through knitting framing shaping machine stentering forming；
2) by the front laminating mesh fabric of pvc softwood, after reverse side laminating densified fabric, multiple through vulcanizing press hot pressing
Close；
3) coat layer food level silica gel in mesh fabric upper surface, then coat layer food level in products obtained therefrom side
Curing oven shaping is sent into, you can finished product after silica gel.
Described mesh fabric, densified fabric are nylon material, and thickness is 0.1-0.3mm, and mesh fabric is provided with
Fine and closely woven mesh, mesh size is 0.01mm × 0.01mm-0.05mm × 0.05mm, grammes per square metre 100-150g/m2, densified fabric is
The casing play of 900-1200d.
Described pvc softwood is pvc soft sheet material, and thickness is 2-4mm, preferably unleaded pvc soft sheet material.
The raw material of described food grade silicone includes following components and weight portion content: coating Bi-component liquid silicone rubber
75-85 weight portion, food-grade calcium carbonate 15-25 weight portion.
Described coating Bi-component liquid silicone rubber is the high temperature vulcanized silica gel of double-component condensed type, including a component and b group
Point, wherein a component is hydroxy-end capped polysiloxanes rubber and tetraethyl orthosilicate crosslinking agent, and b component is octyl group tin catalyst, a
The weight ratio of component and b component is 1: 1 or 10: 1.
The weight ratio preferably 1: 1 of described a component and b component.
The preparation method of described food grade silicone is that food-grade calcium carbonate is first dried 4-8h in an oven, and oven temperature is
90-110 DEG C, weigh coating Bi-component liquid silicone rubber and the food-grade calcium carbonate of corresponding weight by each formula rate, add
Stir in mixer and obtain final product.
Described step 2) in hot pressing be combined process conditions be temperature 160-175 DEG C, time 15-20min.
Described step 3) in curing molding temperature be 110-140 DEG C, the time be 2-8min.
Compared with prior art, the invention has the advantages that
1) the food and medicine conveyer belt contact food of present invention preparation, the top layer food grade silicone of medicine are a kind of thermally-stabilised
The very high linear macromolecule elastomeric material containing silicon oxygen bond of property, its have excellent resistance to ozone aging, oxygen aging, light aging and
The performance of Weather, and heavy metal (in terms of the pb) content of food grade silicon rubber is less than 0.5ppm, the product after coating is just own
Alkane evaporation residue ＜ 400mg/l.Compare used pu foodweb on market, the food and medicine conveyer belt of present invention preparation
The additives such as anti-hydrolytic performance, the grease of resistance to animal or plant, anti-microbial property and sanitation and hygiene performance are more excellent, separate out during use
Thing is less.Non-sticky food during conveyer belt use is it is easy to clean, and top layer flat smooth, in course of conveying is not in
Cling the phenomenon of transported material.
2) food grade silicone, nylon net fibric, pvc film, nylon densified fabric are creatively combined into by the present invention
A kind of food and medicine conveyer belt.Compared with prior art, both solved tpu used for conveyer belt in fresh food transport sanitation and hygiene
And hydrolysis aspect can not reach the problem of food grade standard, solve the anti-weak acid of existing silica gel conveying belt, alkali, organic simultaneously
Solution, animal and plant, mineral oil and fatty performance is weaker, tension tears low intensity, the shortcomings of yielding, and are directly connect with food
Tactile food grade silicone thickness degree is big, difficult for drop-off.
3) present invention preparation food and medicine conveyer belt adopt pvc material as core material, increased textile armature and
The foodweb cost of pvc bottom is relatively low, tension tearing strength is high, creep-resistant property is good, be unlikely to deform, thickness uniformly, make
Use life-span length；Simultaneously because food grade silicone is that on the mesh fabric being coated in and having fine and closely woven mesh, silica gel is difficult for drop-off, attachment
Layer of silica gel thickness is big.
4) the food and medicine conveyer belt of present invention preparation adopts nylon densified fabric is bottom, with supporter and transmission system
Contact, has the excellent properties such as anti-skidding, wear-resisting.
5) preparation method of the food and medicine conveyer belt that the present invention provides directly is fitted two layers of fabric with pvc film, operates
Step is simple, and continuous operation property is strong, and manufacturing process is relatively simple, a pressure one painting, saves production cost, it is to avoid traditional two cloth two glue
The loaded down with trivial details technique of structure palpus second glue spreading secondary drying.
Brief description
Fig. 1 is the cross-sectional view of conveyer belt of the present invention；
Fig. 2 is the preparation technology flow chart of food and medicine conveyer belt of the present invention.
In figure: 1 is food grade silicone coating, 2 is mesh fabric intermediate layer, and 3 is pvc softwood layer, and 4 is densified fabric bottom
Layer.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1～3
As shown in figure 1, a kind of food and medicine conveyer belt, for be arranged in order from top to bottom food grade silicone coating 1, mesh
Fabric intermediate 2, pvc softwood layer 3 and densified fabric bottom 4 are combined the four-layer structure conveyer belt of composition.
As shown in Fig. 2 this food and medicine conveyer belt is made with coating processes using hot pressing, its production procedure is sequentially
For: mesh fabric and densified fabric sizing and pvc hot pressing are combined, coat surface layer, finished product with food grade silicone.Its concrete steps
For:
The first step: by the mesh fabric of nylon material (Taizhou plain is unified into Bu Ye Co., Ltd, mesh size be 0.01mm ×
0.01mm, grammes per square metre 120g/m2) and densified fabric (Taizhou plain is unified into Bu Ye Co., Ltd, 1000d) exist through knitting framing shaping machine
Tentering thermal finalization under 160 DEG C of drying room operating temperature, the process conditions of speed 40m/min；
Second step: by the front laminating mesh of leadless environment-friendly pvc softwood (Zhenjiang Tian Run plastic cement Co., Ltd, thickness 2mm)
Fabric, after reverse side laminating densified fabric, through vulcanizing press in 170 DEG C of temperature, hot pressing under time 20min is combined；
3rd step: coat layer food level silica gel in mesh fabric upper surface, then coat one layer in products obtained therefrom side
Curing oven shaping is sent into, temperature is 120 DEG C, the time is 3min, you can finished product after food grade silicone.
Wherein, food grade silicone formula such as table 1:
Table 1
Wherein, with Bi-component liquid silicone rubber, (macromolecular material Co., Ltd, trade mark htcs- are innovated in Shenzhen to coating
It is 1310h) the high temperature vulcanized silica gel of double-component condensed type, a component is that hydroxy-end capped polysiloxanes rubber is handed over tetraethyl orthosilicate
Connection agent, b component is octyl group tin catalyst；Food-grade calcium carbonate is provided by Shanghai river Shanghai titanium white heavy chemicals Co., Ltd.
Food grade silicone production method is as follows:
First food-grade calcium carbonate is dried in an oven 5h, oven temperature is 100 DEG C.Weigh phase by the formula in each embodiment
Answer coating Bi-component liquid silicone rubber and the food-grade calcium carbonate of weight, add in mixer and stir, you can for applying
Cover.
The food and medicine conveyer belt that above three embodiment is obtained is tested according to hg/t 2818-1996, test knot
Fruit such as table 2:
Table 2
The food and medicine conveyer belt that pu foodweb on market is obtained with above three embodiment as a comparison case
Carry out food, drug safety detection by usafda standard, result such as table 3:
Table 3
As shown in Table 3, the amount of precipitation under various conditions of the silica gel conveying belt in each case study on implementation is all wanted less than standard
The limit value asked, hence it is evident that being better than pu foodweb, this novel foodstuff medicine conveyer belt safety non-toxic, meets hygienic requirements, right
Human body is harmless, complies fully with U.S. fda food safety and sanitation standard.
Embodiment 4
A kind of preparation method of food and medicine conveyer belt, the step of the method is as follows:
1) by mesh fabric, densified fabric respectively through knitting framing shaping machine stentering forming, wherein: described mesh is knitted
Thing, densified fabric are nylon material, and thickness is 0.1mm, and mesh fabric is provided with fine and closely woven mesh, and mesh size is
0.05mm × 0.05mm, grammes per square metre 100/m2, densified fabric is the casing play of 1200d.
2) by the front laminating mesh fabric of pvc softwood, after reverse side laminating densified fabric, multiple through vulcanizing press hot pressing
Close, the process conditions that hot pressing is combined are 160 DEG C of temperature, time 20min；Described pvc softwood is unleaded pvc soft sheet material, thick
Spend for 4mm.
3) coat layer food level silica gel in mesh fabric upper surface, then coat layer food level in products obtained therefrom side
Curing oven shaping is sent into, the temperature of curing molding is 110 DEG C, and the time is 8min, you can finished product after silica gel.
The preparation method of described food grade silicone is that food-grade calcium carbonate is first dried 4h in an oven, and oven temperature is
110 DEG C, then weigh coating Bi-component liquid silicone rubber 75 weight portion, food-grade calcium carbonate 25 weight portion, add mixer
In stir and obtain final product.
Embodiment 5
A kind of preparation method of food and medicine conveyer belt, the step of the method is as follows:
1) by mesh fabric, densified fabric respectively through knitting framing shaping machine stentering forming, wherein: described mesh is knitted
Thing, densified fabric are nylon material, and thickness is 0.3mm, and mesh fabric is provided with fine and closely woven mesh, and mesh size is
0.02mm × 0.02mm, grammes per square metre 150g/m2, densified fabric is the casing play of 900d.
2) by the front laminating mesh fabric of pvc softwood, after reverse side laminating densified fabric, multiple through vulcanizing press hot pressing
Close, the process conditions that hot pressing is combined are 175 DEG C of temperature, time 15min；Described pvc softwood is unleaded pvc soft sheet material, thick
Spend for 2mm.
3) coat layer food level silica gel in mesh fabric upper surface, then coat layer food level in products obtained therefrom side
Curing oven shaping is sent into, the temperature of curing molding is 140 DEG C, and the time is 2min, you can finished product after silica gel.
The preparation method of described food grade silicone is that food-grade calcium carbonate is first dried 8h in an oven, and oven temperature is 90
DEG C, then weigh coating Bi-component liquid silicone rubber 85 weight portion, food-grade calcium carbonate 15 weight portion, add in mixer and stir
Mix and uniformly obtain final product.
Claims (10)
1. a kind of food and medicine conveyer belt is it is characterised in that this conveyer belt is the food grade silicone painting being arranged in order from top to bottom
Layer, mesh fabric intermediate layer, pvc softwood layer and densified fabric bottom are combined the four-layer structure conveyer belt of composition；
The step of the described preparation method of food and medicine conveyer belt is as follows:
1) by mesh fabric, densified fabric respectively through knitting framing shaping machine stentering forming；
2) by the front laminating mesh fabric of pvc softwood, after reverse side laminating densified fabric, it is combined through vulcanizing press hot pressing；
3) coat layer food level silica gel in mesh fabric upper surface, then coat layer food level silica gel in products obtained therefrom side
Send into curing oven shaping afterwards, you can finished product；
The raw material of described food grade silicone includes following components and weight portion content: coating Bi-component liquid silicone rubber 75-
85 weight portions, food-grade calcium carbonate 15-25 weight portion.
2. a kind of preparation method of food and medicine conveyer belt as claimed in claim 1 it is characterised in that the step of the method such as
Under:
1) by mesh fabric, densified fabric respectively through knitting framing shaping machine stentering forming；
2) by the front laminating mesh fabric of pvc softwood, after reverse side laminating densified fabric, it is combined through vulcanizing press hot pressing；
3) coat layer food level silica gel in mesh fabric upper surface, then coat layer food level silica gel in products obtained therefrom side
Send into curing oven shaping afterwards, you can finished product；
The raw material of described food grade silicone includes following components and weight portion content: coating Bi-component liquid silicone rubber 75-
85 weight portions, food-grade calcium carbonate 15-25 weight portion.
3. a kind of preparation method of food and medicine conveyer belt according to claim 2 is it is characterised in that described mesh is knitted
Thing, densified fabric are nylon material, and thickness is 0.1-0.3mm, and mesh fabric is provided with fine and closely woven mesh, and mesh size is
0.01mm × 0.01mm-0.05mm × 0.05mm, grammes per square metre 100-150g/m2, densified fabric is the casing play of 900-1200d.
4. a kind of preparation method of food and medicine conveyer belt according to claim 2 is it is characterised in that described pvc is soft
Material is pvc soft sheet material, and thickness is 2-4mm.
5. a kind of preparation method of food and medicine conveyer belt according to claim 4 is it is characterised in that described pvc is soft
Material is unleaded pvc soft sheet material.
6. a kind of preparation method of food and medicine conveyer belt according to claim 2 is it is characterised in that described food-grade
The preparation method of silica gel is that food-grade calcium carbonate is first dried 4-8h in an oven, and oven temperature is 90-110 DEG C, by each recipe ratio
Example weighs coating Bi-component liquid silicone rubber and the food-grade calcium carbonate of corresponding weight, adds in mixer and stirs i.e.
?.
7. a kind of preparation method of the food and medicine conveyer belt according to claim 2 or 6 is it is characterised in that described
Coating Bi-component liquid silicone rubber is the high temperature vulcanized silica gel of double-component condensed type, and including a component and b component, wherein a component is
Hydroxy-end capped polysiloxanes rubber and tetraethyl orthosilicate crosslinking agent, b component is octyl group tin catalyst, the weight of a component and b component
Amount part ratio is 1:1 or 10:1.
8. a kind of preparation method of food and medicine conveyer belt according to claim 7 is it is characterised in that described a component
1:1 preferred with the weight ratio of b component.
9. a kind of preparation method of food and medicine conveyer belt according to claim 2 is it is characterised in that described step 2)
In hot pressing be combined process conditions be temperature 160-175 DEG C, time 15-20min.
10. a kind of preparation method of food and medicine conveyer belt according to claim 2 is it is characterised in that described step
3) temperature of the curing molding in is 110-140 DEG C, and the time is 2-8min.
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| CN201210004459.XA CN103192560B (en) | 2012-01-06 | 2012-01-06 | Food and medicine conveyor belt and making method thereof |
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| CN103192560B true CN103192560B (en) | 2017-01-18 |
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| CN114249008A (en) * | 2020-09-22 | 2022-03-29 | 安徽御壶匠农业科技有限公司 | Wine gourd structure and manufacturing process thereof |
| CN113524863A (en) * | 2021-07-20 | 2021-10-22 | 李秋语 | Annular conveying belt manufacturing process and annular conveying belt |
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| US6919122B2 (en) * | 1999-07-08 | 2005-07-19 | Saint-Gobain Performance Plastics Corporation | Flexible composites with integral flights for use in high-temperature food processing equipment and methods for producing the same |
| CN101830335A (en) * | 2010-05-06 | 2010-09-15 | 上海永利带业股份有限公司 | Conveyer belt taking warp-knitted bi-axial fabric as framework and manufacturing method thereof |
| CN102285519B (en) * | 2011-04-28 | 2016-08-17 | 上海永利带业股份有限公司 | Light conveyer belt for seed industry and preparation method thereof |
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Denomination of invention: Food and medicine conveyor belt and making method thereof Effective date of registration: 20191202 Granted publication date: 20170118 Pledgee: Chuzhou economic and Technological Development Corporation Pledgor: Shanghai Jieshijie New Materials (Group) Co., Ltd. Registration number: Y2019980000815 |