CN104960764A - PET transparent sheet and composite PE film modified atmosphere packaging material used for food packaging and manufacturing method thereof - Google Patents
PET transparent sheet and composite PE film modified atmosphere packaging material used for food packaging and manufacturing method thereof Download PDFInfo
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- CN104960764A CN104960764A CN201510216611.4A CN201510216611A CN104960764A CN 104960764 A CN104960764 A CN 104960764A CN 201510216611 A CN201510216611 A CN 201510216611A CN 104960764 A CN104960764 A CN 104960764A
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Abstract
The invention discloses a PET transparent sheet and composite PE film modified atmosphere packaging material used for food packaging and a manufacturing method thereof. The modified atmosphere packaging material is formed by a PET transparent sheet layer, a polyurethane glue layer, and a PE film layer. The PET transparent sheet layer and the PE film layer are bonded through the polyurethane glue layer. The modified atmosphere packaging material forms good stiffness and appearance of subsequent processed products and achieves beautiful appearance by using good blister post processing performance of the PET transparent sheet. The material is excellent in heat sealability, and preferably stops water and oxygen, so food would not go bad in a certain shelf-life, thereby achieving requirements of modified atmosphere packaging. The modified atmosphere packaging material can be manufactured by using a dry composite coating machine, production efficiency is greatly improved, and with control of residual solvent, product quality requirement is preferably met.
Description
Technical field
The present invention relates to controlled atmospheric packing material, be specifically related to controlled atmospheric packing material that can be used for packaging for foodstuff of a kind of PET clear sheet compound PE film and preparation method thereof.
Background technology
Controlled atmospheric packing also claims substitution gas to pack, and is called MAP packaging (i.e. Modified Atmosphere Packaging) in the world, is a kind of fresh-keeping packaging that development improvement obtains on the basis of vacuum packaging and nitrogen-filled packaging, is mainly used in food fresh keeping.
The Packaging Principle of controlled atmospheric packing adopts controlled atmosphere gas (2 ~ 4 kinds of gases are by the mixing of food properties proportioning), the air of packing box or packaging bag is replaced, change the external environment condition of box (bag) interior food, the growth procreation of anti-bacteria (germ), slow down the metabolic speed of fresh fruit of vegetables, thus extend freshness date or the shelf life of food.For preserving fruit and vegetable utilizing: fresh fruit of vegetables still carries out respiration after harvesting, consume O
2produce CO
2, increase the CO in environment gradually
2content also reduces O
2concentration, adopt the plastic sheeting of high permeability can carry out gas exchanges with air, supplement the O that consumes
2and discharge CO
2.
When gas is equal with fruits and vegetables respiration rate to the speed of film permeation, the gas in packaging bag reaches a certain equilibrium concentration, fruits and vegetables can be made to maintain faint breath speed and not produce anaerobic respiration, thus delay the maturation of fruits and vegetables and obtain fresh-keeping.
Adopt controlled atmospheric packing can realize guaranteeing the mouthfeel of food, nutrition and freshness date under the prerequisite not adopting anti fouling composition, additive.The packaging of fresh food when being therefore widely used in recent years, but packing most are at present soft material, are difficult to sizing, usually occur commercially with packed form, can not well meet customer need.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides and a kind ofly adopt controlled atmospheric packing material of the PET clear sheet of hard and soft PE film composite molding and preparation method thereof, obtain packing and can be good at reaching the requirement to packing deflection, and utilize the barrier property of PET material and PE material, meet the obstruct requirement of food fresh keeping to gas.
The solution that the present invention solves its technical matters is: a kind of PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff, be made up of PET slide sheet material layers, polyurethane adhesive water layer and PE rete, described PET slide sheet material layers and PE rete are bonded together by polyurethane adhesive water layer.
Preferably, described polyurethane adhesive water layer is formed by dual-component polyurethane adhesive, and described polyurethane adhesive comprises component A and B component, and wherein component A is polyester polyurethane polyol, and B component is TDI-TMP poly-mer.Further preferably, the weight ratio of described component A and B component is 10:1 ~ 2.
Present invention also offers a kind of preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff, comprise the following steps:
1) dual-component polyurethane adhesive and solvent are mixed in proportion, obtain polyurethane glue, then described polyurethane glue is passed through dry compound machine, be uniformly coated on PE film, and dry, obtain polyurethane adhesive water layer; Drying mainly in order to remove the most of solvent in part glue, being convenient to composite molding below; Preferably, described polyurethane adhesive comprises component A and B component, and wherein component A is polyester polyurethane polyol, and B component is TDI-TMP poly-mer; Described solvent is ethyl acetate.Further preferably, described polyurethane glue is according to component A: B component: the weight ratio of solvent=10:1 ~ 2:10 ~ 15 is formulated; Described polyurethane glue adopts 120 order net roller coat cloth, and coating weight is 2.5-2.8g/cm
2.Described oven dry adopts multiple stage to dry, and its temperature is respectively 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, and each drying time is 3-7 second.
2) by the PE film that obtains in step 1) and PET sheet through hot pressing composite molding; Preferably, hot pressing combined temp is 70 ~ 80 DEG C.
3) by step 2) in the sheet material of composite molding that obtains insert slaking in slaking room.Make polyurethane adhesive water cure by slaking, sizing, thus obtain the described PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff.Preferably, described curing temperature is 40 ~ 60 DEG C, and the curing time is 40 ~ 55h.
The invention has the beneficial effects as follows: controlled atmospheric packing material of the present invention, utilize the good plastic uptake aft-loaded airfoil performance of PET clear sheet, form the good deflection of following process product and profile, reach appearance looks elegant, heat sealability is excellent, and to water and oxygen, there is good obstruct, food is undergone no deterioration within certain shelf-life, reaches the requirement of controlled atmospheric packing.Controlled atmospheric packing material of the present invention can adopt dry type composite coating machine to prepare simultaneously, substantially increases production efficiency, adds the control to dissolvent residual, well reach product design requirement.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below by during embodiment is described required use attached
figurebe briefly described.Obviously, described attached
figurejust a part of embodiment of the present invention, instead of whole embodiment, those skilled in the art, can also be attached according to these under the prerequisite not paying creative work
figureobtain other design plans and attached
figure.
figure1 is the structural representation of packing of the present invention
figure.
Detailed description of the invention
Below with reference to embodiment and attached
figureclear, complete description is carried out, to understand object of the present invention, characteristic sum effect fully to the technique effect of design of the present invention, concrete structure and generation.Obviously; described embodiment is a part of embodiment of the present invention, instead of whole embodiment, based on embodiments of the invention; other embodiments that those skilled in the art obtains under the prerequisite not paying creative work, all belong to the scope of protection of the invention.
As
figureshown in 1, the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff of the present invention is made up of PET slide sheet material layers 1, polyurethane adhesive water layer 2 and PE rete 3, and PET slide sheet material layers 1 and PE rete 3 are bonded together by polyurethane adhesive water layer 2.
Wherein PET slide sheet material layers 1 can adopt the conventional PET sheet that can be used for packaging for foodstuff, and thickness is generally 0.3-0.4mm; PE rete 3 thickness is generally at 0.03-0.05mm.Polyurethane adhesive water layer 2 can be formed by the adhesive for polyurethane for PET and PE compound commonly used.Preferably, described polyurethane adhesive water layer 2 is formed by dual-component polyurethane adhesive, and described polyurethane adhesive comprises component A and B component, and wherein component A is polyester polyurethane polyol, and B component is TDI-TMP poly-mer.Further preferably, the weight ratio of described component A and B component is 10:1 ~ 2.
The preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff of the present invention, comprises the following steps:
1) dual-component polyurethane adhesive and solvent are mixed in proportion, obtain polyurethane glue, then described polyurethane glue is uniformly coated on PE film, and dries, obtain polyurethane adhesive water layer;
2) by the PE film that obtains in step 1) and PET sheet through hot pressing composite molding;
3) by step 2) in the sheet material of composite molding that obtains insert slaking in slaking room.
Composite coating machine can be adopted to be prepared, and concrete is described by preferred embodiment.In preparation process, be 35-40m/min by adjusting the speed of coating machine, thus control the steam bubble of composite surface.
Embodiment 1:
1) polyurethane glue is prepared: prepare bi-component polyurethane adhesive, it comprises component A and B component, and wherein component A is polyester polyurethane polyol, and B component is TDI-TMP poly-mer; By component A with B component with solvent acetic acid ethyl ester according to weight ratio be: component A: B component: the ratio of solvent=10:1.5:12 mixes, and obtains polyurethane glue.
The coating that the polyurethane glue prepared introduces composite coating machine is deposited in ware, the PE film that 0.04mm is thick is placed in the discharge position of composite coating machine gluing end, the running velocity arranging composite coating machine is 35m/min, adopt 120 order net rollers at PE film surface coating polyurethane glue, coating weight is 2.5g/cm
2; PE film after coating, enter drying tunnel segmentation and dry, its temperature is respectively 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, and each drying time is 5 seconds; Thus obtain polyurethane adhesive water layer.
2) PET sheet thick to the Compound rubber roller and 0.3mm that pass through the PE film introducing composite coating machine of drying is carried out hot pressing composite molding, hot pressing combined temp is 75 DEG C.
3) arranging slaking room temperature is 50 DEG C, the sheet material after hot pressing composite molding is placed in slaking 48h in slaking room; Obtain the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff of the present invention.
Embodiment 2:
1) polyurethane glue is prepared: prepare bi-component polyurethane adhesive, it comprises component A and B component, and wherein component A is polyester polyurethane polyol, and B component is TDI-TMP poly-mer; By component A with B component with solvent acetic acid ethyl ester according to weight ratio be: component A: B component: the ratio of solvent=10:2:15 mixes, and obtains polyurethane glue.
The coating that the polyurethane glue prepared introduces composite coating machine is deposited in ware, the PE film that 0.045mm is thick is placed in the discharge position of composite coating machine gluing end, the running velocity arranging composite coating machine is 38m/min, adopt 120 order net rollers at PE film surface coating polyurethane glue, coating weight is 2.8g/cm
2; PE film after coating, enter drying tunnel segmentation and dry, its temperature is respectively 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, and each drying time is 7 seconds; Thus obtain polyurethane adhesive water layer.
2) PET sheet thick to the Compound rubber roller and 0.35mm that pass through the PE film introducing composite coating machine of drying is carried out hot pressing composite molding, hot pressing combined temp is 70 DEG C.
3) arranging slaking room temperature is 40 DEG C, the sheet material after hot pressing composite molding is placed in slaking 55h in slaking room; Obtain the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff of the present invention.
Embodiment 3:
1) polyurethane glue is prepared: prepare bi-component polyurethane adhesive, it comprises component A and B component, and wherein component A is polyester polyurethane polyol, and B component is TDI-TMP poly-mer; By component A with B component with solvent acetic acid ethyl ester according to weight ratio be: component A: B component: the ratio of solvent=10:1:10 mixes, and obtains polyurethane glue.
The coating that the polyurethane glue prepared introduces composite coating machine is deposited in ware, the PE film that 0.05mm is thick is placed in the discharge position of composite coating machine gluing end, the running velocity arranging composite coating machine is 40m/min, adopt 120 order net rollers at PE film surface coating polyurethane glue, coating weight is 2.6g/cm
2; PE film after coating, enter drying tunnel segmentation and dry, its temperature is respectively 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, and each drying time is 3 seconds; Thus obtain polyurethane adhesive water layer.
2) PET sheet thick to the Compound rubber roller and 0.4mm that pass through the PE film introducing composite coating machine of drying is carried out hot pressing composite molding, hot pressing combined temp is 80 DEG C.
3) arranging slaking room temperature is 60 DEG C, the sheet material after hot pressing composite molding is placed in slaking 40h in slaking room; Obtain the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff of the present invention.
Detected by the packing obtained in embodiment 1 ~ 3, product physical and chemical performance and outward appearance reach the related request of ASTM and GB, specifically
as table 1shown in.
[0033]
table 1, properties of product test chart
Above better embodiment of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modifications or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (10)
1. the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff, it is characterized in that: be made up of PET slide sheet material layers, polyurethane adhesive water layer and PE rete, described PET slide sheet material layers and PE rete are bonded together by polyurethane adhesive water layer.
2. the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 1, it is characterized in that: described polyurethane adhesive water layer is formed by dual-component polyurethane adhesive, described polyurethane adhesive comprises component A and B component, wherein component A is polyester polyurethane polyol, and B component is TDI-TMP poly-mer.
3. the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 2, is characterized in that: the weight ratio of described component A and B component is 10:1 ~ 2.
4., for a preparation method for the PET clear sheet compound PE film controlled atmospheric packing material of packaging for foodstuff, it is characterized in that, comprise the following steps:
1) dual-component polyurethane adhesive and solvent are mixed in proportion, obtain polyurethane glue, then described polyurethane glue is uniformly coated on PE film, and dries, obtain polyurethane adhesive water layer;
2) by the PE film that obtains in step 1) and PET sheet through hot pressing composite molding;
3) by step 2) in the sheet material of composite molding that obtains insert slaking in slaking room.
5. the preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 4, it is characterized in that: in step 1), described polyurethane adhesive comprises component A and B component, wherein component A is polyester polyurethane polyol host, and B component is TDI-TMP polymer curing agents; Described solvent is ethyl acetate.
6. the preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 5, is characterized in that: described polyurethane glue is according to component A: B component: the weight ratio of solvent=10:1 ~ 2:10 ~ 15 is formulated.
7. the preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 6, is characterized in that: described polyurethane glue adopts 120 order net roller coat cloth, and coating weight is 2.5-2.8g/cm
2.
8. the preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 4, is characterized in that: in step 1), and described oven dry adopts multiple stage to dry, its temperature is respectively 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, each drying time is 3-7 second.
9. the preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 4, is characterized in that: step 2) in, the temperature of described hot pressing compound is 70 ~ 80 DEG C.
10. the preparation method of the PET clear sheet compound PE film controlled atmospheric packing material for packaging for foodstuff according to claim 4, it is characterized in that: in step 3), described curing temperature is 40 ~ 60 DEG C, and the curing time is 40 ~ 55h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510216611.4A CN104960764B (en) | 2015-04-30 | 2015-04-30 | Compound PE films controlled atmospheric packing material of a kind of PET clear sheets for packaging for foodstuff and preparation method thereof |
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|---|---|---|---|
| CN201510216611.4A CN104960764B (en) | 2015-04-30 | 2015-04-30 | Compound PE films controlled atmospheric packing material of a kind of PET clear sheets for packaging for foodstuff and preparation method thereof |
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| CN104960764A true CN104960764A (en) | 2015-10-07 |
| CN104960764B CN104960764B (en) | 2018-02-02 |
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Cited By (4)
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| CN109049907A (en) * | 2018-06-28 | 2018-12-21 | 大连佳兴塑料有限公司 | Food packaging plastic sheet/PE film composite material and preparation method |
| CN111136969A (en) * | 2019-11-13 | 2020-05-12 | 深圳昌茂粘胶新材料有限公司 | Essence-resistant composite PET material and preparation method thereof |
| CN112895398A (en) * | 2021-01-21 | 2021-06-04 | 厦门市奇磊光电科技有限公司 | Manufacturing process of shell paint surface |
| CN114407466A (en) * | 2022-01-18 | 2022-04-29 | 珠海市德燊环保包装有限公司 | Composite membrane and preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112895398B (en) * | 2021-01-21 | 2022-12-20 | 厦门市奇磊光电科技有限公司 | Manufacturing process of shell paint surface |
| CN114407466A (en) * | 2022-01-18 | 2022-04-29 | 珠海市德燊环保包装有限公司 | Composite membrane and preparation method and application thereof |
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| CN104960764B (en) | 2018-02-02 |
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