CN104960764B - Compound PE films controlled atmospheric packing material of a kind of PET clear sheets for packaging for foodstuff and preparation method thereof - Google Patents
Compound PE films controlled atmospheric packing material of a kind of PET clear sheets for packaging for foodstuff and preparation method thereof Download PDFInfo
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- CN104960764B CN104960764B CN201510216611.4A CN201510216611A CN104960764B CN 104960764 B CN104960764 B CN 104960764B CN 201510216611 A CN201510216611 A CN 201510216611A CN 104960764 B CN104960764 B CN 104960764B
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Abstract
The invention discloses compound PE films controlled atmospheric packing material of a kind of PET clear sheets for packaging for foodstuff and preparation method thereof, the controlled atmospheric packing material is made up of PET clear sheets layer, polyurethane adhesive water layer and PE film layers, and the PET clear sheets layer and PE film layers are bonded together by polyurethane adhesive water layer.The controlled atmospheric packing material of the present invention, utilize the good plastic uptake aft-loaded airfoil performance of PET clear sheets, form following process product good deflection and profile, appearance looks elegant is reached, heat sealability is excellent, and there is good barrier to water and oxygen so that food undergoes no deterioration within certain shelf-life, reaches the requirement of controlled atmospheric packing.The controlled atmospheric packing material of the present invention can use dry type composite coating machine to prepare simultaneously, substantially increase production efficiency, plus the control to dissolvent residual, reached product quality requirement well.
Description
Technical field
The present invention relates to controlled atmospheric packing material, and in particular to a kind of compound PE films of PET clear sheets can be used for food bag
Controlled atmospheric packing material of dress and preparation method thereof.
Background technology
Controlled atmospheric packing is also referred to as substitution gas packaging, and referred to as MAP is packed in the world（That is Modified Atmosphere
Packaging）, it is that development improves a kind of resulting fresh-keeping packaging on the basis of vacuum packaging and nitrogen-filled packaging, mainly
For food fresh keeping.
The Packaging Principle of controlled atmospheric packing is to use controlled atmosphere gas（2~4 kinds of gases are by food properties proportioning mixing）, it is right
Packing box or the air of packaging bag enter line replacement, change box（Bag）The external environment condition of interior food, suppress bacterium（Microorganism）Life
Long procreation, slow down the speed of fresh fruit of vegetables metabolism, so as to extend the freshness date of food or shelf life.Using preserving fruit and vegetable utilizing as
Example：Fresh fruit of vegetables still carries out respiration after harvesting, consumes O2Produce CO2, gradually increase the CO in environment2Content simultaneously drops
Low O2Concentration, gas exchanges, the consumed O of supplement can be carried out with air using the plastic sheeting of high permeability2And discharge CO2。
When gas is equal with fruits and vegetables respiration rate to the speed of film permeation, the gas in packaging bag reaches a certain balance
Concentration, fruits and vegetables can be made to maintain faint breath speed without producing anaerobic respiration, be protected so as to delay the maturation of fruits and vegetables
It is fresh.
Can be realized using controlled atmospheric packing ensures mouthfeel, the nutrition of food on the premise of preservative, additive is not used
Composition and freshness date.The packaging of fresh food when being therefore widely used in recent years, but packaging material most at present is soft
Material, it is difficult to shape, occur generally in the form of packed commercially, it is impossible to meet customer need well.
The content of the invention
To solve the deficiencies in the prior art, the present invention provides a kind of PET clear sheets using hard and soft PE films
Controlled atmospheric packing material of composite molding and preparation method thereof, resulting packaging material can be good at reaching to packaging material deflection
Requirement, and using the barrier property of PET material and PE materials, meet barrier requirement of the food fresh keeping to gas.
The present invention solve its technical problem solution be：A kind of compound PE of PET clear sheets for packaging for foodstuff
Film controlled atmospheric packing material, it is made up of PET clear sheets layer, polyurethane adhesive water layer and PE film layers, the PET clear sheets layer
It is bonded together with PE film layers by polyurethane adhesive water layer.
Preferably, the polyurethane adhesive water layer is formed by dual-component polyurethane adhesive, and the polyurethane is gluing
Agent includes component A and component B, and wherein component A is polyester polyurethane polyol, and component B is TDI-TMP polymer.It is further excellent
Selection of land, the component A and component B weight ratio is 10:1~2.
Present invention also offers a kind of preparation of the compound PE films controlled atmospheric packing material of PET clear sheets for packaging for foodstuff
Method, comprise the following steps：
1）Dual-component polyurethane adhesive and solvent are mixed in proportion, obtain polyurethane glue, then by described in
Polyurethane glue by dry compound machine, be uniformly coated on PE films, and dry, obtain polyurethane adhesive water layer；Drying is main
It is to remove most of solvent in the glue of part, be easy to composite molding below；Preferably, the polyurethane adhesive includes
Component A and component B, wherein component A are polyester polyurethane polyol, and component B is TDI-TMP polymer；The solvent is acetic acid
Ethyl ester.It is further preferred that the polyurethane glue is according to component A：Component B：Solvent=10：1~2：10 ~ 15 weight ratio is matched somebody with somebody
What system formed；The polyurethane glue is coated with using 120 mesh net rolls, coating weight 2.5-2.8g/cm2.The drying uses more
Segmentation is dried, and its temperature is respectively 40 DEG C, and 50 DEG C, 55 DEG C, 45 DEG C, each drying time is the 3-7 seconds.
2）By step 1）In obtained PE films pass through hot pressing composite molding with PET sheet；Preferably, hot pressing combined temp is
70~80℃。
3）By step 2）In the obtained sheet material of composite molding insert curing in curing room.Polyurethane glue is made by curing
Solidification, sizing, so as to obtain the described compound PE films controlled atmospheric packing material of the PET clear sheets for packaging for foodstuff.Preferably,
The curing temperature is 40 ~ 60 DEG C, and the curing time is 40 ~ 55h.
The beneficial effects of the invention are as follows：The controlled atmospheric packing material of the present invention, after the good plastic uptake of PET clear sheets
Processing characteristics, following process product good deflection and profile being formed, has reached appearance looks elegant, heat sealability is excellent, and to water
And oxygen has good barrier so that food undergoes no deterioration within certain shelf-life, reaches the requirement of controlled atmospheric packing.This hair simultaneously
Bright controlled atmospheric packing material can use dry type composite coating machine to prepare, and production efficiency be substantially increased, plus to dissolvent residual
Control, reached product quality requirement well.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described.Obviously, described accompanying drawing is the part of the embodiment of the present invention, rather than is all implemented
Example, those skilled in the art on the premise of not paying creative work, can also obtain other designs according to these accompanying drawings
Scheme and accompanying drawing.
Fig. 1 is the structural representation of the packaging material of the present invention.
Embodiment
Carried out below with reference to the design of embodiment and accompanying drawing to the present invention, concrete structure and caused technique effect clear
Chu, complete description, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright part of the embodiment, rather than whole embodiments, based on embodiments of the invention, those skilled in the art is not paying
The other embodiment obtained on the premise of creative work, belongs to the scope of protection of the invention.
As shown in figure 1, the compound PE films controlled atmospheric packing material of the PET clear sheets for packaging for foodstuff of the present invention is by PET
What clear sheet layer 1, polyurethane adhesive water layer 2 and PE film layers 3 formed, PET clear sheets layer 1 and PE film layers 3 pass through polyurethane adhesive
Water layer 2 is bonded together.
Wherein PET clear sheets layer 1 can use the conventional PET sheet available for packaging for foodstuff, and thickness is generally
0.3-0.4mm；The thickness of PE film layers 3 is typically in 0.03-0.05mm.Polyurethane adhesive water layer 2 can be by conventional compound for PET and PE
Adhesive for polyurethane formed.Preferably, the polyurethane adhesive water layer 2 is formed by dual-component polyurethane adhesive, described
Polyurethane adhesive includes component A and component B, and wherein component A is polyester polyurethane polyol, and component B polymerize for TDI-TMP
Thing.It is further preferred that the component A and component B weight ratio is 10：1~2.
The preparation method of the compound PE films controlled atmospheric packing material of the PET clear sheets for packaging for foodstuff of the present invention, including
Following steps：
1）Dual-component polyurethane adhesive and solvent are mixed in proportion, obtain polyurethane glue, then by described in
Polyurethane glue be uniformly coated on PE films, and dry, obtain polyurethane adhesive water layer；
2）By step 1）In obtained PE films pass through hot pressing composite molding with PET sheet；
3）By step 2）In the obtained sheet material of composite molding insert curing in curing room.
It can be prepared using composite coating machine, be specifically described by preferred embodiment.In preparation process,
Can be 35-40m/min by adjusting the speed of coating machine, so as to control the steam bubble of composite surface.
Embodiment 1：
1）Prepare polyurethane glue：Prepare bi-component polyurethane adhesive, it includes component A and component B, wherein component A
For polyester polyurethane polyol, component B is TDI-TMP polymer；By component A and component B with solvent acetic acid ethyl ester according to weight
Than for：Component A：Component B：Solvent=10：1.5：12 ratio is well mixed, and obtains polyurethane glue.
The polyurethane glue prepared is introduced in the coating storage ware of composite coating machine, PE films thick 0.04mm are placed in multiple
The discharge position at coating machine gluing end is closed, the speed of service for setting composite coating machine is 35m/min, using 120 mesh net rolls in PE
Film surface is coated with polyurethane glue, coating weight 2.5g/cm2；PE films after coating, it is segmented and dries into drying tunnel, its temperature point
Wei not be 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, each drying time is 5 seconds；So as to obtain polyurethane adhesive water layer.
2）PE films by drying are introduced into the Compound rubber roller of composite coating machine and PET sheet thick 0.3mm carries out hot pressing
Composite molding, hot pressing combined temp are 75 DEG C.
3）It is 50 DEG C to set curing room temperature, and the sheet material after hot pressing composite molding is placed in curing room and cures 48h；Obtain
The compound PE films controlled atmospheric packing material of the PET clear sheets for packaging for foodstuff of the present invention.
Embodiment 2：
1）Prepare polyurethane glue：Prepare bi-component polyurethane adhesive, it includes component A and component B, wherein component A
For polyester polyurethane polyol, component B is TDI-TMP polymer；By component A and component B with solvent acetic acid ethyl ester according to weight
Than for：Component A：Component B：Solvent=10：2：15 ratio is well mixed, and obtains polyurethane glue.
The polyurethane glue prepared is introduced in the coating storage ware of composite coating machine, PE films thick 0.045mm are placed in
The discharge position at composite coating machine gluing end, the speed of service for setting composite coating machine are 38m/min, are existed using 120 mesh net rolls
PE films surface is coated with polyurethane glue, coating weight 2.8g/cm2；PE films after coating, it is segmented and dries into drying tunnel, its temperature
Respectively 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, each drying time is 7 seconds；So as to obtain polyurethane adhesive water layer.
2）PE films by drying are introduced into the Compound rubber roller of composite coating machine and PET sheet thick 0.35mm carries out hot pressing
Composite molding, hot pressing combined temp are 70 DEG C.
3）It is 40 DEG C to set curing room temperature, and the sheet material after hot pressing composite molding is placed in curing room and cures 55h；Obtain
The compound PE films controlled atmospheric packing material of the PET clear sheets for packaging for foodstuff of the present invention.
Embodiment 3：
1）Prepare polyurethane glue：Prepare bi-component polyurethane adhesive, it includes component A and component B, wherein component A
For polyester polyurethane polyol, component B is TDI-TMP polymer；By component A and component B with solvent acetic acid ethyl ester according to weight
Than for：Component A：Component B：Solvent=10：1：10 ratio is well mixed, and obtains polyurethane glue.
The polyurethane glue prepared is introduced in the coating storage ware of composite coating machine, PE films thick 0.05mm are placed in multiple
The discharge position at coating machine gluing end is closed, the speed of service for setting composite coating machine is 40m/min, using 120 mesh net rolls in PE
Film surface is coated with polyurethane glue, coating weight 2.6g/cm2；PE films after coating, it is segmented and dries into drying tunnel, its temperature point
Wei not be 40 DEG C, 50 DEG C, 55 DEG C, 45 DEG C, each drying time is 3 seconds；So as to obtain polyurethane adhesive water layer.
2）PE films by drying are introduced into the Compound rubber roller of composite coating machine and PET sheet thick 0.4mm carries out hot pressing
Composite molding, hot pressing combined temp are 80 DEG C.
3）It is 60 DEG C to set curing room temperature, and the sheet material after hot pressing composite molding is placed in curing room and cures 40h；Obtain
The compound PE films controlled atmospheric packing material of the PET clear sheets for packaging for foodstuff of the present invention.
The packaging material obtained in embodiment 1 ~ 3 is detected, product physical and chemical performance and outward appearance reach ASTM and national standard
Related request, it is specific as shown in table 1.
Table 1, properties of product test table
The better embodiment of the present invention is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent modifications on the premise of without prejudice to spirit of the invention or replace
Change, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (5)
- A kind of 1. compound PE films controlled atmospheric packing material of PET clear sheets for packaging for foodstuff, it is characterised in that：It is saturating by PET What bright sheet layer, polyurethane adhesive water layer and PE film layers formed, the PET clear sheets layer and PE film layers pass through polyurethane adhesive water layer It is bonded together；The polyurethane adhesive water layer is formed by dual-component polyurethane adhesive, the polyurethane adhesive include component A and Component B, wherein component A are polyester polyurethane polyol, and component B is TDI-TMP polymer；The component A and component B weight ratio is 10:1~2.
- A kind of 2. preparation method of the compound PE films controlled atmospheric packing material of PET clear sheets for packaging for foodstuff, it is characterised in that Comprise the following steps：1) dual-component polyurethane adhesive is mixed in proportion with solvent, obtains polyurethane glue, then gather described Urethane glue is uniformly coated on PE films, and is dried, and obtains polyurethane adhesive water layer；The polyurethane adhesive include component A and Component B, wherein component A are polyester polyurethane polyol host, and component B is TDI-TMP polymer curing agents；The solvent is vinegar Acetoacetic ester；The polyurethane glue is according to component A：Component B：Solvent=10：1~2：10~15 weight ratio is formulated 's；The drying is dried using multisection type, and its temperature is respectively 40 DEG C, and 50 DEG C, 55 DEG C, 45 DEG C, each drying time is 3-7 Second；2) the PE films obtained in step 1) and PET sheet are passed through into hot pressing composite molding；3) sheet material of the composite molding obtained in step 2) is inserted in curing room and cured.
- 3. the preparation of the compound PE films controlled atmospheric packing material of the PET clear sheets according to claim 2 for packaging for foodstuff Method, it is characterised in that：The polyurethane glue is coated with using 120 mesh net rolls, coating weight 2.5-2.8g/cm2.
- 4. the preparation of the compound PE films controlled atmospheric packing material of the PET clear sheets according to claim 2 for packaging for foodstuff Method, it is characterised in that：In step 2), the compound temperature of the hot pressing is 70~80 DEG C.
- 5. the preparation of the compound PE films controlled atmospheric packing material of the PET clear sheets according to claim 2 for packaging for foodstuff Method, it is characterised in that：In step 3), the curing temperature is 40~60 DEG C, and the curing time is 40~55h.
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| Application Number | Priority Date | Filing Date | Title |
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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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| 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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| CN104960764B true CN104960764B (en) | 2018-02-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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