CN208558474U - A kind of more fold films - Google Patents

Abstract

The utility model discloses a kind of more fold films, belong to film applications, including base and the protective layer that the base two sides are arranged in, the two sides of the base have protrusion, a groove is formed between the two neighboring protrusion, the spreading width that the protective layer corresponds to the width position of the groove is greater than the width of the groove, utility model has the advantages that passing through setting groove, film is in bending, due to mechanical characteristic, it can preferentially be bent in weak load-bearing point when bending, the position of protective layer respective protrusions can't generate extension when therefore bending, and the part of respective slot width position can generate extension, but since the spreading width of this position is larger, therefore it largely can reduce the deformation of protective layer, extend the service life of film.

Description

A kind of more fold films

Technical field

The utility model relates to film applications, especially a kind of more fold films.

Background technique

Film is a kind of thin and flexible transparent sheet.It is made of plastics, adhesive, rubber or other materials.Membrane science On explanation are as follows: by atom, 2 dimension materials that molecule or ion deposition are formed in substrate surface.Example: optical thin film, laminated film, Superconducting thin film, polyester film, nylon film, plastic film etc..Film is widely used in electronic apparatus, mechanical, the row such as printing Industry.

Plastic film is usually used thin made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins Film for packing, and is used as coating layer.Shared share is increasing on the market for plastics package and plastic packet product, Especially composite plastic flexible package has been widely used for the fields such as food, medicine, chemical industry, wherein again with food packaging institute Accounting example is maximum, such as beverage packaging, quick-frozen food packaging, cooking food packaging, fast food packaging etc., these products are all given People's life brings great convenience.

However some films are chronically exposed to outdoor, plasticizer is gradually oozed out to surface, and plasticizer is in use not Disconnected volatilization, rain and dew can make plasticizer fade away the extraction of plasticizer in addition.Plasticizer is industrially to be widely used High molecular material auxiliary agent, this substance is added in plastic processing, can make its flexibility enhance, be easily worked, plasticizer Evolution rear film, which can be hardened, to become fragile, and aging of turning to be yellow, the ultraviolet light long-term irradiation in sunlight will lead to plasticizer and go bad, and can also cause Film aging.

In addition, traditional film is lamination layer structure, in bending, according to material deformation principle, one side material Extruding, opposite side generation extension are generated, and neutral line does not generate variation, therefore film is in the process for bending and extending repeatedly In be easy to produce embrittlement, most film when in use, such as greenhouse film, can generate bending and extension when being laid with, newly Film when in use since toughness and ductility are preferable, be generally not in problem.But since film needs to recycle, And need often film to be raised and covered conjunction in different plantation periods, it inevitably can more frequently be produced during aforesaid operations Raw bending and extension, when using the time, too long, when film is hardened, ductility and toughness decline, traditional film is due to frequent Generation material extruding and extend can accelerated ageing embrittlement process, reduce the service life.

Utility model content

The main purpose of the utility model is to provide a kind of more fold films to bend film by the way that groove is arranged Shi Zidong is bent by concave part, and the expanded width in protective layer respective slot portion is greater than the width of groove, can be in certain journey The stretching and extruding that protection coating materials are avoided on degree, extend the service life of film.

To achieve the above objectives, the technical solution adopted in the utility model are as follows: a kind of more fold films, including base and set The protective layer in the base two sides is set, the two sides of the base have protrusion, and it is recessed to form one between the two neighboring protrusion Slot, the spreading width that the protective layer corresponds to the width position of the groove are greater than the width of the groove.

More preferably, the protective layer includes the anti-evolution layer and anti-aging layer set gradually from inside to outside, and anti-evolution layer can To reduce the evolution speed of plasticiser, the brittle speed of film is reduced.

More preferably, the anti-evolution layer is made of EVOH material, and EVOH has preferable insulating effect, can reduce plasticizing The evolution speed of agent, and the EVOH transparency with higher, can reduce anti-evolution layer influences lighting effect.

More preferably, the anti-aging layer is made of the PVC material for being embedded with ultraviolet radiation absorption particle, ultraviolet radiation absorption particle The ultraviolet light in sunlight can be absorbed, reduce the rate of deterioration of plasticiser.

More preferably, it is provided with plasticiser in the groove, the two sides of the film are blocked by the protective layer, are arranged recessed Plasticiser in slot can make base and protective layer keep toughness, delaying aging speed for a long time with slow release.

It more preferably, is arc transition between the protrusion and the base, by mechanical characteristic it is found that material is in bending, Its stress centrostigma is to most easily produce breaking part, and stress centrostigma is not present due to being open and flat setting in conventional films The problem of, and since there are the design of groove, the raised transition position with base will form stress centrostigma in the application, therefore will Being designed as arc transition between protrusion and base can avoid transition position from producing fracture to avoid the formation of stress centrostigma.

Compared with the prior art, the advantages of the utility model are: film is in bending, due to power by setting groove Characteristic is learned, when bending can preferentially be bent in weak load-bearing point, therefore the position of protective layer respective protrusions can't when bending Extension is generated, and the part of respective slot width position can generate extension, but since the spreading width of this position is larger, The deformation that largely can reduce protective layer extends the service life of film.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of a preferred embodiment according to the present utility model；

Fig. 2 is partial enlarged view at Fig. a kind A.

Appended drawing reference: base 10, protrusion 11, circular arc chamfering 12, anti-evolution layer 20, extension 21, anti-aging layer 22, plasticizing Agent 30.

Specific embodiment

It is described below for disclosing the utility model so that those skilled in the art can be realized the utility model.It retouches below Preferred embodiment in stating is only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.

As shown in Figs. 1-2, one embodiment of the utility model: a kind of more fold films, including base 10 and setting exist The protective layer of 10 two sides of base, the two sides of the base 10 have to be formed between protrusion 11, two neighboring described raised 11 One groove, the spreading width that the protective layer corresponds to the width position of the groove is greater than the width of the groove, such as Fig. 1 institute Showing, the width of groove is the distance between a point and b point H, and protective layer generates the extension 21 of indent in the corresponding position distance H, Width i.e. under its flat is greater than H.

The protective layer includes the anti-evolution layer 20 and anti-aging layer 22 set gradually from inside to outside, and anti-evolution layer 20 can be with The evolution speed for reducing plasticiser 30, reduces the brittle speed of film.

The anti-evolution layer 20 is made of EVOH material, and EVOH has preferable insulating effect, can reduce plasticiser 30 Evolution speed, and the EVOH transparency with higher, can reduce anti-evolution layer 20 influences lighting effect.EVOH (ethylene/ Ethenol copolymer, Ethylene vinyl alcohol copolymer) it is always to apply most high barrier materials.This The film type of kind material is other than non-stretching type, and there are also biaxial tension type, aluminium-vapour deposition type, binder application type etc., two-way drawings It stretches in type and is used for aseptic packaging product there are also heat resistant type.EVOH distinguishing feature is that have fabulous barrier property and fabulous to gas Processability, otherwise see-through property, glossiness, mechanical strength, retractility, wearability, cold resistance and surface strength are all very excellent.Increase Volatilization can gradually be escaped outward by moulding agent, and the anti-spilled layer made of EVOH has good insulating effect, can slow down plasticising The evolution of agent extends the service life of film.

The anti-aging layer 22 is made of the PVC material for being embedded with ultraviolet radiation absorption particle, and ultraviolet radiation absorption particle can be with The ultraviolet light in sunlight is absorbed, the rate of deterioration of plasticiser 30 is reduced.Ultraviolet radiation absorption particle is a kind of light stabilizer, can be absorbed Ultraviolet part in sunlight and fluorescent light source, and itself does not change.Due to containing in sunray largely to coloured The harmful ultraviolet light of object, about 290-460 nanometers of wavelength, these harmful ultraviolet lights pass through redox chemically (Redox reaction), makes color molecule finally decompose colour fading.It is embedded in ultraviolet resistant layer into ultraviolet radiation absorption particle, it can By the ultraviolet radiation absorption in sunlight, to reduce its rotten catalysis to the plasticizer in base 10.

Plasticiser 30 is provided in the groove, the two sides of the film are blocked by the protective layer, are arranged in groove Plasticiser 30 base 10 and protective layer can be made to keep toughness, delaying aging speed for a long time with slow release.

It is arc transition between described raised 11 and the base 10, by mechanical characteristic it is found that material is in bending, by Power centrostigma is to most easily produce breaking part, and asking for stress centrostigma is not present due to being open and flat setting in conventional films Topic, and since there are the design of groove, the transition position of protrusion 11 and base 10 will form stress centrostigma in the application, therefore will Circular arc chamfering 12 is designed as between protrusion 11 and base 10 to avoid transition position from generating disconnected to avoid the formation of stress centrostigma It splits.

Compared with the prior art, the advantages of the utility model are: film is in bending, due to power by setting groove Learn characteristic, when bending, can preferentially be bent in weak load-bearing point, therefore when bending protective layer respective protrusions 11 position not Extension can be generated, and the part of respective slot width position can generate extension, but since the spreading width of this position is larger, because This largely can reduce the deformation of protective layer, extend the service life of film.

Basic principles, main features, and advantages of the present invention has been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model Protection scope defined by appended claims and its equivalent.

Claims (6)

1. a kind of more fold films, which is characterized in that including base (10) and the protective layer in the base (10) two sides is set, The two sides of the base (10) have raised (11), form a groove, the protective layer between two neighboring raised (11) The spreading width of position width (H) of the corresponding groove is greater than the width (H) of the groove.

2. a kind of more fold films according to claim 1, which is characterized in that the protective layer includes from inside to outside successively The anti-evolution layer (20) being arranged and anti-aging layer (22).

3. a kind of more fold films according to claim 2, which is characterized in that the anti-evolution layer (20) is EVOH material It is made.

4. a kind of more fold films according to claim 2, which is characterized in that the anti-aging layer (22) is to be embedded with purple The PVC material of outside line absorbing particles is made.

5. a kind of more fold films according to claim 1, which is characterized in that it is provided with plasticiser in the groove, it should The two sides of film are blocked by the protective layer.

6. a kind of more fold films according to claim 1, which is characterized in that the protrusion (11) and the base (10) Between be arc transition.