CN1343102A

CN1343102A - Shoe toe or heel end stiffener

Info

Publication number: CN1343102A
Application number: CN00804983A
Authority: CN
Inventors: 罗杰·A·查普曼
Original assignee: Texon UK Ltd
Current assignee: Noxet UK Ltd
Priority date: 1999-03-13
Filing date: 2000-02-24
Publication date: 2002-04-03
Also published as: AU2813100A; US20020108269A1; WO2000054617A1; KR20010109309A; PL350416A1; BR0010451A; TW498101B; ZA200107156B; GB9905755D0; EP1161158A1; ID30210A

Abstract

A shoe toe or heel end stiffener consisting of a net, at least some strands of which are of hot melt adhesive material having an activation temperature of between 50 DEG C. and 80 DEG C. Suitable adhesive materials include polycaprolactone and certain polyesters. The stiffeners are of improved stiffness per unit weight, in comparison with previously known stiffeners.

Description

Toe-cap or heel of a shoe end stiffener

Technical field

The present invention relates to a kind of toe-cap or heel of a shoe end stiffener, particularly a kind of heel of a shoe end stiffener.

Term used herein " footwear " can be understood that to represent to be through the footwear of outside, typically refers to that preparation is worn or footwear during manufacture.

Background technology

Some footwear (for example sport footwear) need weight lighter heel end reinforcement (often being meant that " the hard portion of counter " (counter)) relatively.The technology of making the hard portion of counter of light weight is known for the those of ordinary skill of making in hard field of counter, for example make by being squeezed in the relative harder thermoplastic film that surface thereof or two surperficial upper stratas are pressed with fabric and are coated with adhesive, but these manufacture methods are relatively complicated, and are difficult to the intensity and the hardness that provide enough when weight is very light.

Proposed by using a kind of thermoplastic to replace independent adhesive phase, this thermoplastic can provide enough hardness, but it can be bonded together with staple in bulk under the shoemaking temperature, thereby this hardened material just is used to as a kind of hot-melt adhesive in hard of the counter of footwear.In our PCT patent application NO.GB98/03159 of common pending trial, the hard portion of this counter has been described, a kind of shoe stiffener has wherein been described, in this shoe stiffener, the fixed melt spun fibre of hot-melt adhesive combines with staple in bulk provides a kind of fibre-reinforced hot-melt adhesive footwear to strengthen film.Yet this material require hot-melt adhesive and fibrous reinforcement form melt-spun, realize the desirable mixing of staple in bulk and adhesive.

Summary of the invention

A purpose in each purpose of the present invention provides a kind of improved toe-cap or heel end reinforcement.

One aspect of the present invention provides a kind of toe-cap or heel end reinforcement, comprises a net, and wherein at least some lines are made by the hot melt adhesive agent material of activation temperature between 50 ℃ and 80 ℃.Suitable is, in a kind of reinforcement according to the present invention, and wired can the making of net by hot-melt adhesive.

Perhaps, a kind of shoe stiffener according to the present invention can comprise the line of different polymer, and some lines comprise a kind of binder polymer, and other line is harder a little polymer, and it does not have cohesive under the activation temperature between 50 ℃ and 80 ℃.For example this net is a kind of rectangle net, and wherein the parallel lines that extend along a direction are the hot-melt adhesive line, and the hot melt activation temperature of line rectangular with it is not less than 80 ℃ (though they can be the thermoplastic higher fusion temperatures that has).Suitable is that when a kind of reinforcement according to the present invention was placed in the footwear, its net was such structure and arranges that promptly the hot-melt adhesive line is parallel to sole usually that other line vertical with above-mentioned line is also basic vertical with sole.If desired, reinforcement can be made like this, and promptly line is along other direction.

Be applicable to that manufacturing can make by a kind of expressing technique according to the net of reinforcement of the present invention, wherein a kind of material of fusing is extruded by the hole in the extrusion die, thereby the many lines with appropriate intervals are provided.This technology is known for those of ordinary skills, and this technology is designed so that line contacts each other when it still is in molten state, thereby makes a net.The net of this universal class is available on market, and for example from 2810 Weeks Avenue S.E.Minneapolis of the U.S., the Conwed Plastics of MN55414 can buy.

In another kind of reinforcement according to the present invention, at least some lines are bi-components, and a kind of component is the hot melt adhesive agent material, and its activation temperature is between 50 ℃ and 80 ℃, and the hot melt activation temperature of another kind of component is higher than 80 ℃.Above-mentioned another kind of component can be selected, thereby makes reinforcement have needed characteristic, and it can be harder or softer a little, and more pliable and tougher, like this, and easier its undeformed shape of returning of the reinforcement of distortion.Bicomponent fibre can be made by the known several different technologies of those of ordinary skills.Preferably the bi-component line is a kind of skin/cored structure (it is outer to be the hot melt adhesive agent material).

Line according to the net in the reinforcement of the present invention can have any suitable cross section or shape, so that needed performance to be provided.For example the cross section of line can be flat, circle, H type cross section, leafy (multilobal), can select and strengthen hardness by increasing thickness, or reducing the risk (can see through vamp see line) of print through by selection, this perspective is unacceptable.

Size (being the size of the perforate in the net) according to the line in the shoe stiffener of the present invention can be selected according to needed performance.It is desirable to, according to the area of the perforate in the net of shoe stiffener of the present invention at 0.03 square centimeter of (cm ²) and 0.4 (cm ²) between, be more preferably at 0.06cm ²And 0.2cm ²Between.

It is desirable to, according to the weight of a kind of reinforcement of the present invention between 250 and 600 grams every square metre (gsm), be more preferably 300 and 450gsm between.

When thereby needs make reinforcement of the present invention still keep net form to make vamp keep ventilative property after being applied to vamp, should select interval, the shape and size of the line of net, thus be attached to the last top-stitching of vamp can be not coalescent.

Thereby have enough hardness and intensity provide for the rear heel of vamp required degree reinforcement, the hot melt adhesive agent material of activation temperature between 50 ℃ and 80 ℃ can be used for according to a kind of reinforcement of the present invention.The material that is fit to comprises: PCL, some polyester binder are for example based on the adhesive that gathers (adipic acid butylidene ester) and some polyurethane binder.The polyester-based material that is fit to can be from English Bostik Limited, and Leicester (trade mark is Esterpow or Estergran) obtains.

In order to explain the present invention, the hard portion of counter of embodying a kind of footwear of the present invention will be described hereinafter by example.The hard portion of counter that should be appreciated that footwear is used to illustrate, so that explain the present invention by example.

Brief description of drawings

Accompanying drawing 1 is the plane as the hard portion of illustrational counter.

The working of an invention mode

As hard 8 of illustrational counter is to downcut from a kind of PCL net that is provided by Conwed Plastics, and will be inserted in hard the bag of counter at rear portion of vamp.To those skilled in the art, provide hard bag of a counter and in the shoemaking process the hard portion of counter to be inserted and secured on wherein be known.

The cross section of the line of net (the hard portion of counter downcuts from it) is normally circular, and diameter is about 1mm.Be generally the net of rectangular configuration by connecting up, be furnished with one group of parallel lines 10 in this net, when hard 8 of counter was placed in the footwear, their bearing of trend was parallel to sole usually; And another group line 12 is vertical with the direction of sole usually.Line 12 is spaced apart from each other, thereby has 27 on 10 centimetres length, and line 10 is spaced apart to such an extent that open a little, is furnished with 20 on 10 centimetres length, promptly is about 0.5cm at interval.

The perforated area of the net that illustrative counter is hard 8 is about 0.11cm ²The weight of the hard portion of illustrative counter is about 340gsm.

After hard 8 of counter is placed in hard bag of counter, it is heated and pressurizes, thereby PCL is fully activated the adhesive state, this assembly is heated to about 70 ℃ temperature with activation PCL adhesive material.After cooling, hard 8 of illustrative counter has high rigidity on per unit weight, and the hard portion of counter has additional advantage, promptly has ventilative property.

Compare with the hard portion of film counter of the about identical weight of per unit area, quite big in the hardness of vertical (being the direction that line 12 extends), laterally the hardness of (being the direction that line 12 extends) is approximately identical.Compare with the hard portion of film counter that has in order to prevent wet continuous impermeable film, because the perforate of net makes the hard portion of illustrative counter have ventilative property.Therefore, the hard portion of illustrative counter is better on wearing comfortableness.

Can believe that a large amount of lines can improve the hardness on the per unit weight of the hard portion of counter, this be because, line tends to produce a kind of " crossbeam " effect, this does not then exist in hard of film counter.Table 1 has provided the comparison of hard 8 of illustrative counter and a kind of reinforcing material well known in the art performance condition on an equal per unit area weight.

In fact usually as a kind of toe-cap end reinforcing material, and by the registration mark Tufflex of applicant company, designationE268 provides with the existing reinforcing material of making comparisons.Two kinds of materials have every square metre of identical gram (gsm) weight substantially.The standard specification that illustrative counter is hard 8 is very big, and it has improved hardness.Hardness AL is the hardness of measuring vertically in table 1, i.e. the hardness of measuring on the direction parallel with line 12.Hardness AX is the hardness in cross measure, i.e. the hardness of measuring on the direction parallel with line 10.

Table 1

		The hard portion of illustrative counter	Existing reinforcing material
		The hard portion of illustrative counter	Existing reinforcing material	Weight (gsm)		????341+/-0.5	????345+/-0.095
Standard specification (mm)		????1.10+/-0.0009	????0.41+/-0.0002	Weight (gsm)		????341+/-0.5	????345+/-0.095
Standard specification (mm)		????1.10+/-0.0009	????0.41+/-0.0002	Karl Frank hardness	????AL	????62.5+/-1.8	????21.3+/-0.6
	????AX	????16.3+/-0.1	????18.8+/-0.1	Karl Frank hardness	????AL	????62.5+/-1.8	????21.3+/-0.6

Compare with current material, hard 8 of illustrative counter not only has the hardness on the per unit weight that has strengthened, and having simpler structure, it has tack, and the PCL net just can provide hardness not needing to add under the situation of any accessory fibers.

Claims

1. toe-cap or heel end reinforcement comprise a net, and wherein at least some lines are the hot melt adhesive agent material of activation temperature between 50 ℃ and 80 ℃.

2. reinforcement as claimed in claim 1, wherein all lines of net are made by hot-melt adhesive.

3. reinforcement as claimed in claim 1, wherein net is a kind of rectangle net, in the time of in putting it into footwear, hot-melt adhesive line wherein is basically parallel to sole, is not less than 80 ℃ with the hot melt activation temperature of the rectangular line of sole.

4. reinforcement as claimed in claim 1, wherein at least some lines are bi-component, and a kind of component is the hot melt adhesive agent material, and its activation temperature is between 50 ℃ and 80 ℃, and the hot melt activation temperature of another kind of component is higher than 80 ℃.

5. any one described reinforcement in the claim as described above, wherein the perforated area in the net is between 0.03 square centimeter and 0.4 square centimeter.

6. any one described reinforcement in the claim as described above, wherein the perforated area in the net is between 0.06 square centimeter and 0.2 square centimeter.

7. any one described reinforcement in the claim as described above, its weight is between every square metre of every square metre of 250 gram and 600 gram.

8. reinforcement as claimed in claim 7, its weight is between every square metre of 300 gram and 450 restrain every square metre.

9. any one described reinforcement in the claim as described above, wherein the hot melt adhesive agent material comprises PCL.