CN101746536A

CN101746536A - Compound bottle and manufacturing method thereof

Info

Publication number: CN101746536A
Application number: CN200810219972A
Authority: CN
Inventors: 郭锡南
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-15
Filing date: 2008-12-15
Publication date: 2010-06-23

Abstract

The invention discloses a compound bottle which is composed of a bottle neck, a bottle body and a bottle bottom, wherein the bottle body and the bottle bottom form the bottle body by an inner layer, a middle layer and an outer layer, two sides of the middle layer are respectively stuck to the outer layer and the inner layer, and the inner layer and the bottle neck are in a whole and are shaped by the same material. When the compound bottle is manufactured, spotting is carried out, and a bottle body blank with a double-layer structure is manufactured by the blowing process; then, filling, pulling and blowing technologies are adopted to process the inner layer to ensure that the inner layer is tightly stuck to the inner part of the bottle body blank; and finally, die sinking is carried out, and the compound bottle finished product is taken out. The inner layer of the invention prevents leakage and corrosion, the middle layer strengthens hardness and shades light, and the outer layer can prevent ultraviolet rays and performs the action of decoration. The compound bottle does not need a bond coat, has simple structure and technology and low cost, and is suitable for industries, such as chemical industry, beverage, pesticide and the like.

Description

Compound bottle and manufacture method thereof

Technical field

The invention belongs to daily Packaging Bottle field, relate in particular to compound bottle of a kind of plastics and manufacture method thereof.

Background technology

Plastic bottle is widely used in multiple product packing aspect as packing container.For medicine, especially the biological species medicine holds, just require secluding air at memory period, vacuumizing or additive method keeps amount of air near zero at the bottle inner chamber after removing air, in other words, promptly in long-time storing process, do not allow outside air (mainly being oxygen in the air) to infiltrate through the bottle wall.And existing monolayer plastic bottle such as polyethylene bottle or PVC bottle can not reach this requirement to the barrier property of gas.

For addressing this problem, ZL 200520033656.X number, the utility model of high barrier temperature-resistant multi-layer plastic bottle discloses following technical scheme: a kind of high barrier temperature-resistant multi-layer plastic bottle, comprise bottle, it is characterized in that, described bottle is made up of the plastics wall more than three layers or three layers, its interlayer plastics wall material is selected polycarbonate for use, polyethylene terephthalate or polyvinylidene chloride a kind of, the material of other layer plastics wall is selected polycarbonate for use, the compound of the compound of polycarbonate and polyethylene terephthalate or polycarbonate and polybutylene terephthalate or polyvinylidene chloride a kind of; The gross thickness of bottle is between 0.2～3mm.

Common 3～5 layers of the structure of this bottle (considering from processing and economic angle), the material more than three layers can be selected from above-mentioned resin or other resin is made.

From technique scheme, (interlayer also refers to laminboard layer to the interlayer of this laminated plastics wall, as for 3 layers of bottle, the 2nd layer is interlayer, for 4 layers of bottle, 2nd, 3 layers all can be interlayer, in the case, then with the 2nd layer or the 3rd layer be interlayer all can) material be polycarbonate, polyethylene terephthalate or poly(vinylidene fluoride), compare with the common polythene plastics, the three all has higher serviceability temperature and physical strength and better gas barrier property.Simultaneously, this is novel in the multi-layer forming process, general employing four screw rod bottle blowing machine manufacturings form, three screw rods are made ground floor plastics wall respectively according to the order of sequence, second layer plastics wall, the three-layer plastic wall, multilayer bottle manufacturing equipment since between adjacent layer the mol wt of (having one at least) High molecular material can be variant or material through modification, the steric configuration of molecule may be inequality, thereby establish a spiro rod plasticizing and make the bonding coat that is provided with between each layer, after such bottle wall more than three layers or three layers is superimposed with each other, iris action to gas is just better than the plastic bottle that single-layer resin forms, and the whole air-tightness of bottle is improved, secondly, ectonexine all adopts the heatproof plastics, and the resistance to elevated temperatures of bottle also is improved.

At present, material is by polycarbonate (being commonly called as PC), polyethylene terephthalate (being commonly called as PET) or poly(vinylidene fluoride), extend to and use polyamide (being commonly called as nylon, PA), polyethylene (being commonly called as PE), the molten difference of above material, price is also different with characteristic, and is high as molten points such as polycarbonate, polyamide, and the molten point of polyethylene terephthalate is low, both primary liquidities, parameters such as viscosity, need to require high especially to the mould temperature of mould in the production process when different plastics are cooperated all at different temperature spots, technology difficulty is big, Mold Making cost height.

Summary of the invention

In order to overcome above technical matters, the invention provides a kind of simple in structurely, cost is low, and air-tightness is good, the compound bottle and the manufacture method thereof of producing easily.

Goal of the invention of the present invention is achieved through the following technical solutions: a kind of compound bottle, constitute by bottleneck, body and a bottle end, wherein bottle is formed by skin, middle level and internal layer in the body and the bottle end, and the both sides, middle level are close to skin and internal layer respectively, and internal layer and bottleneck are that one is by the same material moulding.

Described skin is the antiultraviolet decorative layer of PE plastics, and the middle level is the light shield layer that adds strong hardness of PE plastics, and internal layer is the corrosion-resistant coating of PET or PC plastics.

Make the method for above-mentioned compound bottle: first matched moulds, make double-deck bottle base with blow molding process; Again with the inside of annotating, drawing, blow moulding being processed internal layer and be close to the bottle base; Compound bottle finished product is taken out in last die sinking.

Describedly making double-deck bottle base with blow molding process, is to be blow molded into the bottle that body and the bottle end constitute with the twin screw bottle blowing machine by bottle blowing technology.

Described with the internal layer of annotating, drawing, blow moulding is produced, be Shooting Technique to be produced be with the internal layer base substrate of bottleneck to carry out thermoplastic, put into blown double-decker bottle base, insertion is blown bar softening internal layer base substrate is stretched, and blow into gas and internal layer is blown be close in the double-deck bottle base, cooling forms.

The compound bottle of the present invention is made by two kinds of slush molding method combinations, middle level and skin are to use the extrusion blow technological forming, internal layer be with annotate, draw, the blow moulding moulding, internal layer leakproof and corrosion prevention, middle level add strong hardness and shading, and skin can keep off ultraviolet ray and play decoration function, need not bonding coat, structure and technology are simple, and cost is low, are applicable to industries such as chemical industry, beverage, agricultural chemicals.

Description of drawings

Fig. 1 is the double-deck bottle base of the compound bottle of the present invention;

Fig. 2 is the band bottleneck internal layer base substrate of the compound bottle of the present invention;

Fig. 3 is the finished figure of the compound bottle of the present invention;

Fig. 4 is the enlarged drawing at A place among Fig. 3;

Fig. 5 is the flow scheme of the compound bottle of the present invention;

Fig. 6 is the machining state of double-decker bottle base of the present invention;

Fig. 7 is an internal layer base substrate extended state of the present invention;

Fig. 8 is an internal layer base substrate air blowing state of the present invention.

The specific embodiment

Referring to Fig. 1 to 4, the compound bottle of the present invention, constitute by bottleneck, body and a bottle end, wherein the body and the bottle end, constitute outer 1 by the antiultraviolet decorative layer of PE plastics, the PE plastics that add strong hardness are that the light shield layer of material constitutes middle level 2, and reaching with PET or PC plastics is the corrosion-resistant coating formation internal layer 3 composition bottles of material, and 2 both sides, middle level are close to skin 1 and internal layer 3 respectively, internal layer 3 is an one with bottleneck, by same PET or PC forming materials.

Referring to Fig. 5, manufacturing process flow of the present invention: first matched moulds, make double-deck bottle base with blow molding process; Again with the inside of annotating, drawing, blow moulding being processed internal layer and be close to the bottle base; Compound bottle finished product is taken out in last die sinking.

Above-mentionedly making double-deck bottle base with blow molding process, is to be blow molded into the bottle that body and the bottle end constitute with the twin screw bottle blowing machine by bottle blowing technology, sees Fig. 6.Like this; two kinds of PE are formed bottle simultaneously; require relatively low to manufacturing equipment; the middle level materials are emphasized shade function and add strong hardness, and the materials cost can suitably reduce, and the antiultraviolet decorative layer beautifies appearance; it is not attractive in appearance because of causing as black of adding of shade function to have covered the middle level; add the antiultraviolet material simultaneously, protected middle level and internal layer to award ultraviolet irradiation and the problem accelerating to wear out, also block the influence of ultraviolet ray simultaneously Loaded goods in the bottle.

Above-mentioned with the internal layer of annotating, drawing, blow moulding is produced, be Shooting Technique to be produced be with the internal layer base substrate of bottleneck to carry out thermoplastic, put into blown double-decker bottle base, insertion is blown bar softening internal layer base substrate is stretched, see Fig. 7, and blow into gas and internal layer is blown be close in the double-deck bottle base, see Fig. 8, cooling forms.Internal layer uses PET or PC plastics, with annotate, draw, blow moulding production, Shooting Technique makes bottleneck precision height, hard and guarantee that the bottleneck sealing is reliable, PET possesses acid and alkali-resistance, and good airproof performance is effectively isolated the pollution of the additive of middle level and outer field shading material, retaining ultraviolet ray material etc. to Loaded goods in the bottle.

Claims

1. compound bottle was made of bottleneck, body and a bottle end, it is characterized in that: bottle is formed by outer, middle level and internal layer in the described body and the bottle end, and the both sides, middle level are close to skin and internal layer respectively, and internal layer and bottleneck are that one is by the same material moulding.

2. compound bottle according to claim 1, it is characterized in that: described skin is the antiultraviolet decorative layer of PE plastics, and the middle level is the light shield layer that adds strong hardness of PE plastics, and internal layer is the corrosion-resistant coating of PET or PC plastics.

3. make above-mentioned compound bottle method for one kind, it is characterized in that:

A, matched moulds are made double-deck bottle base with blow molding process;

B, with annotate, draw, blow moulding is with internal layer processing and be close to the inside of bottle base;

Compound bottle finished product is taken out in C, die sinking.

4. according to the method for the compound bottle of the described manufacturing of claim 3, it is characterized in that: describedly making double-deck bottle base with blow molding process, is a bottle that is blow molded into body and bottle end formation with the twin screw bottle blowing machine by bottle blowing technology.

5. according to the method for the compound bottle of the described manufacturing of claim 3, it is characterized in that: described with the internal layer of annotating, drawing, blow moulding is produced, be Shooting Technique to be produced be with the internal layer base substrate of bottleneck to carry out thermoplastic, put into blown double-decker bottle base, insertion is blown bar softening internal layer base substrate is stretched, and blow into gas and internal layer is blown be close in the double-deck bottle base, cooling forms.