1. A strong-absorption PET film with hardness comprises a PET film main body (1), and is characterized in that: an intermediate layer (2) is laid on the PET film main body (1), a plurality of pairs of uniformly distributed supporting balls (201) are fixedly connected to the intermediate layer (2), the middle layer (2) is paved with an adsorption layer (3), a plurality of grooves which are uniformly distributed and matched with the support balls (201) are respectively arranged on the PET film main body (1) and the adsorption layer (3), a support column (202) is fixedly connected in the support ball (201), two ends of the support column (202) are respectively bonded with the PET film main body (1) and the adsorption layer (3), the gap between the adsorption layer (3) and the middle layer (2) is filled with an adsorption block (4), a plurality of strip-shaped film bags which are uniformly distributed are fixedly connected between the PET film main body (1) and the middle layer (2), the strip-shaped film bags are stored with coagulants (5), and flexible films are connected among the strip-shaped film belts.

2. The strongly adsorptive PET film having a hardness according to claim 1, wherein: the middle layer (2) is made of flexible resin, activated fiber powder is doped in the resin, the particle size of the activated fiber powder is 100-200nm, and a fiber mesh is embedded in the middle layer (2).

3. The strongly adsorptive PET film having a hardness according to claim 1, wherein: the adsorption layer (3) is made of porous resin, and a water guide film is connected between the adsorption layer and the adsorption block (4).

4. The strongly adsorptive PET film having a hardness according to claim 1, wherein: the adsorption block is characterized in that a plurality of uniformly distributed flow guide thorns (401) are connected between the adsorption block (4) and the adsorption layer (3), the diameter of each flow guide thorn (401) is 0.3-0.5mm, each flow guide thorn (401) is a capillary fiber thorn made of a porous fiber material, and each flow guide thorn (401) is inserted into the adsorption layer (3).

5. The strongly adsorptive PET film having a hardness according to claim 1, wherein: support ball (201) and be hollow tube-shape, and the equal fixedly connected with water-soluble seal piece in upper and lower both ends of support ball (201), two the terminal surface of support ball (201) bonds through waterproof glue respectively with between PET membrane main part (1) and adsorbed layer (3), support ball (201) internal storage has the powdered ink, the water-soluble seal piece will support ball (201) both ends and seal in order to seal the storage to the powdered ink.

6. The strongly adsorptive PET film having a hardness according to claim 1, wherein: the PET membrane main part (1) and the recess inner wall of adsorbed layer (3) all laid with support ball (201) assorted hot melt membrane, the outer wall and the hot melt membrane of support ball (201) pass through heat-conducting glue and bond.

7. The strongly adsorptive PET film having a hardness according to claim 1, wherein: the strip-shaped film bag is made of a hot melt film, the hot melt film is made of high-melting-point paraffin, and the melting point of the paraffin is 70 ℃.

8. The strongly adsorptive PET film having a hardness according to claim 1, wherein: the PET film is characterized in that the coagulator (5) is gypsum powder, a waterproof film is laid at one end, close to the middle layer (2), of the PET film main body (1), and a plurality of uniformly distributed activated fiber rods are doped in the coagulator (5).

9. The strongly adsorptive PET film having a hardness according to claim 1, wherein: the preparation method comprises the following steps:

s1, firstly, selecting a PET substrate, polishing and preparing a PET film main body (1);

s2, prefabricating the middle layer (2) and the adsorption layer (3) and storing at normal temperature, after preparing the middle layer (2) and the adsorption layer (3), stretching and polishing the middle layer (2) and the adsorption layer (3) to be as thick as the PET film main body (1);

s3, grooving the PET film main body (1) and the adsorption layer (3) by using an embossing device, wherein the depth of the grooving is half of the thickness of the PET film main body (1) and the adsorption layer (3), and the embossing device adopts a cold pressing process to perform grooving;

s4, mounting support balls (201) on the middle layer (2), pre-coating low-temperature-resistant waterproof glue at two ends of each support ball (201), mounting a pair of support balls (201) in each pressure groove, distributing a plurality of pairs of support balls (201) in an array manner, wherein the distance between every two adjacent pressure grooves is 5-8mm, and the pressure grooves are distributed in an array manner at equal intervals;

and S5, compounding the PET film main body (1), the middle layer (2) and the adsorption layer (3) at high pressure.

10. The hardness-variable strongly adsorptive PET film according to claim 9, wherein: and in the step S5, low-temperature gas is introduced as protective gas during high-pressure compounding, so that the whole membrane is in a low-temperature environment of 0-15 degrees during compounding.

Background

The PET film is a packaging film with relatively comprehensive performance. The transparency is good and the gloss is good; the air tightness and the fragrance retention are good; moderate moisture resistance and reduced moisture permeability at low temperatures. The PET film has excellent mechanical performance, the toughness is the best of all thermoplastic plastics, and the tensile strength and the impact strength are much higher than those of the common films; and the product has good stiffness and stable size, and is suitable for secondary processing of printing, paper bags and the like. The PET film also has excellent heat resistance, cold resistance and good chemical resistance and oil resistance. The film has excellent physical and mechanical properties of common polyester film, and also has excellent optical properties, such as good transparency, low haze and high glossiness. The film is mainly used for high-grade vacuum aluminized products, is mirror-surface after aluminized and has good packaging and decorating effects; it can also be used for laser anti-fake basement membrane.

Most flexibilities of present PET film are softer, lay and can only play the effect of keeping apart on article surface, can not play fine guard action to some soft articles that warp easily, for example the article that flexible resin made, PET only can play the isolation after laying the film, can not play guard action when the article warp again, and the function is single, is difficult for satisfying different user demands.

Disclosure of Invention

1. Technical problem to be solved

In view of the problems in the prior art, an object of the present invention is to provide a hardness-variable, strongly adsorptive PET film, which can achieve strong adsorption of the adhesion surface of the PET film, effectively absorb the wall surface, and does not cause large deformation of the PET film after absorption, and which can be hardened after heating the PET film and absorbing a large amount of moisture in the PET film, so that the PET film has strong adsorption and the hardness of the PET film can be changed as required.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a strong adsorbability PET membrane of sclerosis degree, includes PET membrane main part, PET membrane main part upper berth is equipped with the intermediate level, fixedly connected with is many to evenly distributed's support ball on the intermediate level, the intermediate level upper berth is equipped with the adsorbed layer, all cut on PET membrane main part and the adsorbed layer have a plurality of evenly distributed and with support ball assorted recess, support ball internal fixedly connected with support column, the both ends of support column bond with PET membrane main part and adsorbed layer respectively, the clearance packing between PET membrane main part and the intermediate level has the adsorption block, a plurality of evenly distributed's of fixedly connected with bar membrane bag between adsorbed layer and the intermediate level, the storage has the coagulant in the bar membrane bag, and is a plurality of be connected with the flexible membrane between the bar membrane area. The face that bonds that can realize making the PET membrane has strong adsorbability, the effective absorption wall the, and can not make the PET membrane take place great deformation after absorbing, and to the PET membrane heating back, making the PET membrane carry out a large amount of moisture absorption backs, the PET membrane can harden, makes PET be having strong adsorbability and can change the hardness of PET membrane as required.

Furthermore, the middle layer is made of flexible resin, activated fiber powder is doped in the resin, the particle size of the activated fiber powder is 100-200nm, a fiber screen is embedded in the middle layer, the stretch-resistant performance of the device is guaranteed through the fiber screen, the fiber screen can absorb partial moisture to play a waterproof role, the formed adsorption layer is a porous resin layer serving as a surface layer, the adsorption capacity of the film layer is improved, and the overall flexibility of the film is guaranteed through the middle core layer under the action of the flexible resin.

Further, the adsorbed layer is made by porous resin, makes fashioned adsorbed layer be the porous resin layer, be connected with the water guide membrane between adsorbed layer and the adsorption block, make the adsorbed layer reach the absorption limit after, unnecessary moisture accessible water guide membrane is leading-in the adsorption block, makes the adsorption block absorb water to absorb the excessive moisture in the back adsorbed layer, prevent that the adsorbed layer from excessively absorbing water and producing local expansion.

Furthermore, a plurality of uniformly distributed flow guide thorns are connected between the adsorption block and the adsorption layer, the flow guide thorns are capillary fiber thorns made of porous fiber materials, the diameter of each flow guide thorn is 0.3-0.5mm, the flow guide thorns are inserted into the adsorption layer, and water adsorbed in the adsorption layer is guided into the adsorption block through the flow guide of the capillary fiber thorns, so that the adsorption block can fully absorb the water.

Further, support ball (201) and be hollow tube-shape, and the equal fixedly connected with water-soluble seal piece in upper and lower both ends of support ball (201), two the terminal surface of support ball (201) bonds through the waterproof glue respectively with between PET membrane main part (1) and adsorbed layer (3), the powdered ink has been stored in support ball (201), water-soluble seal piece will support ball (201) both ends and seal in order to seal the powdered ink and preserve, water-soluble seal piece long-term with melt after the contact, support the powdered ink release in the ball to this mark infiltration point.

Further, a hot melt film matched with the support balls is laid on the inner walls of the grooves of the PET film main body and the adsorption layer, and the outer walls of the support balls are bonded with the hot melt film through heat conducting glue.

Further, the strip-shaped film bag is made of a hot melt film, the hot melt film is made of paraffin with high melting point, the melting point of the paraffin is 70 ℃, and the strip-shaped film bag can be decomposed after being heated, so that the coagulant stored in the strip-shaped film bag can be released only in a heated state.

Furthermore, the coagulating agent is gypsum powder, a waterproof membrane is laid at one end, close to the middle layer, of the PET membrane main body, a plurality of uniformly distributed activated fiber rods are doped in the coagulating agent, after water vapor permeates into the coagulating agent, part of the water vapor directly contacts with gypsum powder particles, and the gypsum powder is coagulated after contact reaction with water, so that the membrane is integrally hardened.

A high-absorptivity hard PET film is prepared by the following steps:

s1, firstly, selecting a PET substrate, polishing and preparing a PET film main body;

s2, prefabricating the middle layer and the adsorption layer, storing at normal temperature, preparing the middle layer and the adsorption layer, and then stretching and polishing the middle layer and the adsorption layer to be as thick as the PET film main body;

s3, pressing grooves in the PET film main body and the adsorption layer by using an embossing device, wherein the depth of each pressing groove is half of the thickness of the PET film main body and the adsorption layer, and the embossing device adopts a cold pressing process to press the grooves;

s4, mounting support balls on the middle layer, pre-coating low-temperature-resistant waterproof glue at two ends of each support ball, mounting a pair of support balls in each pressure groove, wherein the support balls are distributed in an array manner, the distance between every two adjacent pressure grooves is 5-8mm, and the pressure grooves are distributed in an array manner at equal intervals;

and S5, compounding the PET film main body, the middle layer and the adsorption layer at high pressure.

Further, low-temperature gas is introduced as protective gas during high-pressure compounding in the step S5, so that the whole film is in a low-temperature environment of 0-15 ℃ during compounding, and the hot melt film in the film is prevented from melting and cracking during compounding.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme can realize making the face of bonding of PET membrane have strong adsorbability, the effective absorption wall, and can not make the PET membrane take place great deformation after absorbing, and to the PET membrane heating back, make the PET membrane carry out a large amount of moisture absorption backs, the PET membrane can harden, makes PET be having strong adsorbability and can change the hardness of PET membrane as required.

(2) The middle layer is made of flexible resin, the core layer is acted by the flexible resin to ensure the overall flexibility of the membrane, activated fiber powder is doped in the resin, the particle size of the activated fiber powder is 100-200nm, a fiber screen is embedded in the middle layer, the anti-stretching performance of the device is ensured through the fiber screen, and the fiber screen can absorb part of moisture to play a role in water prevention.

(3) A plurality of evenly distributed flow guide thorns are connected between the adsorption block and the adsorption layer, the diameter of each flow guide thorn is 0.3-0.5mm, each flow guide thorn is a capillary fiber thorn made of porous fiber materials, the flow guide thorns are inserted into the adsorption layer, and flow guide is carried out through the capillary fiber thorns, so that water adsorbed in the adsorption layer is guided into the adsorption block, and the adsorption block fully absorbs the water.

(4) The support ball is hollow tube-shape, and the equal fixedly connected with water-soluble seal piece in upper and lower both ends of support ball, and the terminal surface of two support balls bonds through the waterproof glue respectively between PET membrane main part and the adsorbed layer, and the powdered ink is stored in the support ball, and the water-soluble seal piece will support the ball both ends and seal in order to seal the powdered ink and preserve, melts after long-term and the contact of water-soluble seal piece, supports the powdered ink release in the ball to this mark infiltration point.

(5) The strip-shaped film bag is made of hot melt film, the hot melt film is made of high-melting-point paraffin, the melting point of the paraffin is 70 ℃, and the strip-shaped film bag can be decomposed after being heated, so that the coagulant stored in the strip-shaped film bag can be released only in a heated state.

(6) The solidifying agent is gypsum powder, a waterproof film is laid at one end, close to the middle layer, of the PET film main body, a plurality of uniformly distributed activated fiber rods are doped in the solidifying agent, after water vapor permeates into the solidifying agent, part of the water vapor directly contacts with gypsum powder particles, and the gypsum powder is solidified after contact reaction with water, so that the film is integrally hardened.

(7) And S5, introducing low-temperature gas as protective gas during high-pressure compounding to ensure that the whole film is in a low-temperature environment of 0-15 ℃ during compounding and prevent the hot melt film in the film from melting and cracking during compounding.

(8) The adsorbed layer is made by porous resin, makes fashioned adsorbed layer be the porous resin layer as the top layer, improves the adsorption efficiency of rete, is connected with the water guide membrane between adsorbed layer and the adsorption block, makes the adsorbed layer reach the adsorption limit after, during the leading-in adsorption block of unnecessary moisture accessible water guide membrane, makes the adsorption block absorb water to absorb the excessive moisture in the back adsorbed layer, prevent that the adsorbed layer from excessively absorbing water and producing local expansion.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic view of the structure at A in FIG. 3;

FIG. 5 is a schematic view of the structure of the interlayer of the present invention.

The reference numbers in the figures illustrate:

1PET membrane main part, 2 intermediate layers, 201 supporting balls, 202 supporting columns, 3 adsorption layers, 4 adsorption blocks, 401 flow guide thorns and 5 coagulants.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection can be direct connection or indirect connection through an intermediate medium, and can be communication inside the model adapting element. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-4, a high-absorptivity hard PET film comprises a PET film body 1, wherein an intermediate layer 2 is laid on the PET film body 1, a plurality of pairs of uniformly distributed support balls 201 are fixedly connected to the intermediate layer 2, an adsorption layer 3 is laid on the intermediate layer 2, a plurality of grooves which are uniformly distributed and matched with the support balls 201 are drilled on the PET film body 1 and the adsorption layer 3, support pillars 202 are fixedly connected to the support balls 201, two ends of each support pillar 202 are respectively bonded to the PET film body 1 and the adsorption layer 3, adsorption blocks 4 are filled in gaps between the PET film body 1 and the intermediate layer 2, a plurality of uniformly distributed strip-shaped film bags are fixedly connected between the adsorption layer 3 and the intermediate layer 2, coagulants are stored in the strip-shaped film bags, the strip-shaped film bags are made of hot melt films, and flexible films are connected between the strip-shaped film bags, so that adjacent strip-shaped film bags cannot be separated far when the strip-shaped film bags are bent along with a film layer, the hot melt film is made of high-melting-point paraffin, the melting point of the paraffin is 70 ℃, the strip film bag can be decomposed after being heated, so that a coagulant stored in the strip film bag can be released only in a heated state, the coagulant 5 is gypsum powder, a waterproof film is laid at one end, close to the middle layer 2, of the PET film main body 1, a plurality of uniformly distributed activated fiber rods are doped in the coagulant 5, after water vapor permeates into the coagulant 5, part of the water vapor directly contacts with gypsum powder particles, and the gypsum powder solidifies after contact reaction with water, so that the film is integrally hardened.

Referring to fig. 3-4, the middle layer 2 is made of flexible resin, and activated fiber powder is doped in the resin, the particle size of the activated fiber powder is 100-200nm, and a fiber mesh is embedded in the middle layer 2, so that the tensile resistance of the device is ensured through the fiber mesh, and the fiber mesh can absorb part of moisture to play a role in water resistance. Support ball 201 is hollow tube-shape, and the equal water-soluble seal of both ends of the upper and lower both ends of support ball 201, two terminal surfaces that support ball 201 bond through the waterproof glue respectively with between PET membrane main part 1 and the adsorbed layer 3, the powdered ink has been stored in support ball 201, the water-soluble seal will support ball 201 both ends and seal and preserve the powdered ink, dissolve after long-term and water contact of water-soluble seal, the powdered ink release in the support ball 201, ooze the water spot with this mark. The hot melt film matched with the supporting ball 201 is laid on the inner walls of the grooves of the PET film main body 1 and the adsorption layer 3, and the outer wall of the supporting ball 201 is bonded with the hot melt film through heat conducting glue.

Referring to fig. 4, the adsorption layer 3 is made of porous resin, and a water-conducting film is connected between the adsorption layer and the adsorption block 4, so that the formed adsorption layer 3 is a porous resin layer, and after the adsorption layer 3 reaches the adsorption limit, the excess water can be introduced into the adsorption block 4 through the water-conducting film, so that the adsorption block 4 absorbs water to absorb the excess water in the adsorption layer 3, thereby preventing the adsorption layer 3 from absorbing excessive water and generating local expansion. A plurality of evenly distributed flow guide thorns 401 are connected between the adsorption block 4 and the adsorption layer 3, the diameter of each flow guide thorn 401 is 0.3-0.5mm, each flow guide thorn 401 is a capillary fiber thorn made of a porous fiber material, the flow guide thorns 401 are inserted into the adsorption layer 3, and water adsorbed in the adsorption layer is guided into the adsorption block 4 through the capillary fiber thorns, so that the adsorption block 4 can fully absorb the water.

A high-absorptivity hard PET film is prepared by the following steps:

s1, firstly, selecting a PET substrate, polishing and preparing a PET film main body 1;

s2, prefabricating the middle layer 2 and the adsorption layer 3, storing at normal temperature, preparing the middle layer 2 and the adsorption layer 3, and then stretching and polishing the middle layer 2 and the adsorption layer 3 to be as thick as the PET film main body 1;

s3, grooving the PET film main body 1 and the adsorption layer 3 by using an embossing device, wherein the depth of the grooving is half of the thickness of the PET film main body 1 and the adsorption layer 3, and the embossing device adopts a cold pressing process to perform grooving;

s4, mounting the support balls 201 on the middle layer 2, pre-coating low-temperature-resistant waterproof glue on two ends of each support ball 201, mounting a pair of support balls 201 in each pressure groove, wherein a plurality of pairs of support balls 201 are distributed in an array form, the distance between every two adjacent pressure grooves is 5-8mm, and the plurality of pressure grooves are distributed in an array form at equal intervals;

s5, compounding the PET film main body 1, the middle layer 2 and the adsorption layer 3 at high pressure, and introducing low-temperature gas as protective gas during high-pressure compounding to ensure that the whole film is in a low-temperature environment of 0-15 ℃ during compounding, so as to prevent the hot melt film in the film from melting and cracking during compounding.

The PET film of the scheme is adhered to a base surface through the adsorption layer 3 in the using process, the adsorption layer 3 is made of porous resin, so that the adsorption layer 3 adsorbs moisture and gas in the using process and guides the moisture and the gas to the coagulant 5 through 301, the hot melt film is dissolved after the whole film is heated to 70 ℃ because the adsorption layer 3 and the adsorption layer 1 are locked in a limiting mode by 201, at the moment, the top end of the support column 202 is opened, the adsorption block 4 is communicated with the coagulant 5 through the support column 202, water vapor separated out from the adsorption block 4 is discharged into the coagulant 5 through the support column 202 during heating, the coagulant 5 is coagulated, the whole PET film is coagulated through the coagulant 5 in the grooves, the hardness change of the PET film is realized, the film main body of the scheme can change the hardness according to the using condition, for example, articles made of resin or plastic materials are coated, and the articles are easy to deform and the deformation resistance is reduced after being heated, the coating can be hardened in advance on the article, the hardened film layer improves the deformation resistance of the whole article when being subjected to external acting force, the structural strength of the article is effectively supplemented, and the article which is heated and easy to soften is prevented from deforming due to external force under the high-temperature condition.

Can realize making the face of bonding of PET membrane have strong adsorbability, the effective absorption wall the, and can not make the PET membrane take place great deformation after absorbing, and to the PET membrane heating back, make the PET membrane carry out a large amount of moisture absorption backs, the PET membrane can harden, protect the covering surface through the sclerosis, make PET be having strong adsorbability and can change the hardness of PET membrane as required, this scheme still can be suitable for and lays the demand with the rigid membrane of different unsmooth curved surfaces, this scheme carries out hardening treatment again after laying, easily satisfy the demand of laying of carrying out the rigid membrane to irregular curved surface.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.